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Mr. Lacasse has 10 years of remediation, sampling, and construction inspection and oversight experience. His experience includes construction oversight, flare system startups and inspections related to greenhouse gas (GHG) offset projects, estimation of GHG emissions and emissions inventories, landfill gas (LFG) collection system design, LFG-related regulatory compliance, LFG modeling, and LFG collection system trouble shooting and diagnostics.

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    • Mr. Lacasse has 10 years of remediation, sampling, and construction inspection and oversight experience. His experience includes construction oversight, flare system startups and inspections related to greenhouse gas (GHG) offset projects, estimation of GHG emissions and emissions inventories, landfill gas (LFG) collection system design, LFG-related regulatory compliance, LFG modeling, and LFG collection system trouble shooting and diagnostics. Mr. Lacasse also has experience in the design of treatment systems and field oversight for system installation, start-up, and decommissioning. Mr. Lacasse has specialized experience in wastewater treatment plant and remediation system operation, maintenance, monitoring, troubleshooting and optimization. He has supervised the removal and installation of underground storage tanks (UST) for the Massachusetts Highway Department, in accordance with State and Federal UST regulations.

Mr. Kevin Lakey, LHG, PE, is a Vice President and Project Director. He has been working in the solid waste engineering and environmental consulting field since 1985. Mr. Lakey provides technical expertise for a wide variety of solid waste projects and hydrogeologic studies in the Northwest. His project experience includes the design of bottom liners and cover systems for municipal solid waste landfills, facility permitting, hydrogeologic characterization of solid waste sites, RCRA hazardous waste sites, proposed waste, disposal facilities, agriculture sites, regional aquifer systems, and leaking underground storage tanks, feasibility studies, and site studies for property transfers.

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    • Mr. Kevin Lakey, LHG, PE, is a Vice President and Project Director. He has been working in the solid waste engineering and environmental consulting field since 1985. Mr. Lakey provides technical expertise for a wide variety of solid waste projects and hydrogeologic studies in the Northwest. His project experience includes the design of bottom liners and cover systems for municipal solid waste landfills, facility permitting, hydrogeologic characterization of solid waste sites, RCRA hazardous waste sites, proposed waste, disposal facilities, agriculture sites, regional aquifer systems, and leaking underground storage tanks, feasibility studies, and site studies for property transfers.
      Mr. Lakey’s responsibilities include engineering design, preparing plans, specifications, and quality assurance documents, coordinating project work, serving as engineer of record, negotiating with agencies, analyzing, and interpreting hydrogeologic and geochemical data, evaluating remedial alternatives for site cleanups, preparing technical reports, and preparing permit documents. In addition, Mr. Lakey has provided expert testimony for several projects related to permitting issues, insurance cost recovery, and litigation. From 1985 through 2009, his previous employment included Dames & Moore, EMCON, and Kleinfelder.

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Mr. David Lamadrid, LG, RG, is a Senior Project Professional in our Portland, OR, office. He has been working in the environmental consulting field since 1995. Mr. Lamadrid is involved in all aspects of groundwater characterization, remedial investigation/feasibility studies (RI/FS), preliminary assessments (PA), environmental site assessments, and soil and groundwater remediation and solid waste hydrogeology.

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    • Mr. David Lamadrid, LG, RG, is a Senior Project Professional in our Portland, OR, office. He has been working in the environmental consulting field since 1995. Mr. Lamadrid is involved in all aspects of groundwater characterization, remedial investigation/feasibility studies (RI/FS), preliminary assessments (PA), environmental site assessments, and soil and groundwater remediation and solid waste hydrogeology. He has performed as a project manager, project geologist, and field manager for small- and large-scale projects involving a broad range of investigation techniques for sampling various environmental media such as sediments, groundwater, soil, landfill gas, soil-gas, and air to address a variety of contaminants.
      Mr. Lamadrid has worked on a wide range of solid waste related projects, including preparation of environmental monitoring plans and reports, landfill-gas evaluations, corrective measures studies, and installation of compliance monitoring networks. He is experienced with developing work scopes and coordinating environmental investigation and monitoring programs, and with developing various client and regulatory review work products (e.g., proposals, work plans, memoranda, and reports). In addition to his experience with environmental investigations, Mr. Lamadrid has also supported litigation and insurance claims defense involving contaminant source identification, chemical fate and transport, and cost recovery and allocation under Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) actions. He has also been involved with a variety of hydrogeologic studies to evaluate groundwater use feasibility and resources, and is experienced with aquifer pump testing techniques and analysis. From 1996 through 2008, his previous employment included Dames & Moore, Kleinfelder, Exponent, and Shaw Environmental.

Mr. Lamb, PE is a Vice President and director of SCS’s Charlotte, NC office. He has nearly 30 years of experience in solid and hazardous waste management, environmental engineering, civil engineering, hydrology and hydraulics, landfill engineering, remedial design, and regulatory compliance.

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    • Mr. Lamb, PE is a Vice President and director of SCS’s Charlotte, NC office. He has nearly 30 years of experience in solid and hazardous waste management, environmental engineering, civil engineering, hydrology and hydraulics, landfill engineering, remedial design, and regulatory compliance. He has managed over 400 landfill projects for design, permitting, and construction quality assurance (CQA) activities.

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Mr. Lambert is a Project Manager in the Tampa, Florida office of SCS Field Services (SCS-FS). Mr. Lambert provides SCS-FS with over seven years of experience in operations and maintenance of landfill gas (LFG) collection systems and operation of a landfill leachate pretreatment plant.

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    • Mr. Lambert is a Project Manager in the Tampa, Florida office of SCS Field Services (SCS-FS). Mr. Lambert provides SCS-FS with over seven years of experience in operations and maintenance of landfill gas (LFG) collection systems and operation of a landfill leachate pretreatment plant. Mr. Lambert’s LFG experience includes data management, the operations and maintenance of LFG recovery collection systems, passive landfill gas barrier/vent systems, and leachate and condensate management systems. Mr. Lambert has also operated a leachate pretreatment plant located at the Medley Landfill, Medley, Florida.

Mr. Landeros is a Project Professional in our air quality monitoring division. He has more than 20 years of experience in the operation and maintenance of air monitoring equipment and certification standards. He has degrees in engineering and architecture and is fluent in technical English and Spanish.

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    • Mr. Landeros is a Project Professional in our air quality monitoring division. He has more than 20 years of experience in the operation and maintenance of air monitoring equipment and certification standards. He has degrees in engineering and architecture and is fluent in technical English and Spanish.

Mr. Langdon has over 20 years of experience in the environmental field, including project management, hydraulic testing, site characterization, groundwater modeling, environmental site assessment, and vapor intrusion assessment and mitigation with an emphasis on dry cleaner and industrial chlorinated solvent sites. His responsibilities have included management of site investigation and remediation programs, coordination of hydraulic testing programs, designing groundwater flow models, preparing Environmental Site Assessments, and performing a variety of investigative fieldwork including soil and soil gas sampling, drilling oversight, groundwater monitoring well installation, and groundwater sampling.

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    • Mr. Langdon has over 20 years of experience in the environmental field, including project management, hydraulic testing, site characterization, groundwater modeling, environmental site assessment, and vapor intrusion assessment and mitigation with an emphasis on dry cleaner and industrial chlorinated solvent sites. His responsibilities have included management of site investigation and remediation programs, coordination of hydraulic testing programs, designing groundwater flow models, preparing Environmental Site Assessments, and performing a variety of investigative fieldwork including soil and soil gas sampling, drilling oversight, groundwater monitoring well installation, and groundwater sampling.

Mr. Lape is a Project Director for the Risk Management Group in our Tracer Environmental Division. His responsibilities include outlining project budgets, organizing project schedules, and quality control. He is experienced in the development and deployment of standardized Risk Management and Process Safety Management (PSM) Programs, including process safety program implementation and PSM support to manufacturing facilities that utilize ammonia as a refrigerant. Prior to joining SCS, he served as Director of EHS Programs and Compliance for Dean Foods were he directed a team of professionals who provided PSM/RMP support, as well as support for storm water, wastewater, and air permitting at the company’s facilities.

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    • Mr. Lape is a Project Director for the Risk Management Group in our Tracer Environmental Division. His responsibilities include outlining project budgets, organizing project schedules, and quality control. He is experienced in the development and deployment of standardized Risk Management and Process Safety Management (PSM) Programs, including process safety program implementation and PSM support to manufacturing facilities that utilize ammonia as a refrigerant. Prior to joining SCS, he served as Director of EHS Programs and Compliance for Dean Foods were he directed a team of professionals who provided PSM/RMP support, as well as support for storm water, wastewater, and air permitting at the company’s facilities.
      Mr. Lape’s experience includes developing EPA Risk Management Program submittals for EPA review and approval, all aspects of preparing a PSM program, including participating in Process Hazard Analyses and preparing qualitative risk analyses. Mr. Lape is also experienced in developing Process Safety Information packets, drafting Piping and Instrumentation Diagrams, writing Standard Operating Procedures, and developing and conducting initial and refresher training for Ammonia Refrigeration Operators.
      Mr. Lape has also been involved in auditing PSM programs, performing over 20 audits since 2015, helping to ensure that facilities are keeping their employees and the public safe, while maintaining compliance with regulations. In addition to auditing the safety and compliance programs for ammonia refrigeration facilities, Mr. Lape is often requested to audit the mechanical integrity of those systems.

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Dr. Latimer, CSE, is an ecologist and an environmental planner with over 20 years’ experience in environmental assessment, planning and permitting. He specializes in projects that are often large, complex, or controversial, and involve a combination of land use, environmental permitting, and other constraints.

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    • Dr. Latimer, CSE, is an ecologist and an environmental planner with over 20 years’ experience in environmental assessment, planning and permitting. He specializes in projects that are often large, complex, or controversial, and involve a combination of land use, environmental permitting, and other constraints. Dr. Latimer’s projects typically involve issues related to site evaluation and constraints analysis, wetlands, water quality, the Endangered Species Act (ESA), and the National Environmental Policy Act (NEPA). Dr. Latimer has extensive experience related specifically to planning, permitting, and implementing projects that challenge the built?natural environment interface, including landfills, mines, sewage treatment facilities, and similar developments. He has a solid understanding of engineering concepts and practices and is adept at working collaboratively with engineering professionals to ensure optimum balance between environmental and engineering constraints. These projects often require careful assessments of alternatives, impacts, and opportunities (including value engineering), as well as ensuring that the project and the associated public process (e.g., NEPA, local land use, etc.) is technically well supported. Dr. Latimer is also an adjunct professor at Portland State University where he develops and teaches environmental permitting and compliance workshops for professionals, including environmental project management, NEPA, wetlands, water quality, and endangered species.

Mr. Law is a Vice President of SCS Engineers and our National Geotechnical Expert. He has over three decades of engineering and management experience in geotechnical engineering, solid waste management, landfill engineering, construction quality assurance (CQA) services, and subsurface soil investigation/exploration programs (including embankment and MSE Wall evaluation). He is a licensed Professional Engineer in North Carolina, South Carolina, Virginia, Maryland, and Idaho. He belongs to several industry organizations, including ASCE, SWANA, USGBC, PENC, and is currently a Board Member of the International Solid Waste Association (ISWA).

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    • Mr. Law is a Vice President of SCS Engineers and our National Geotechnical Expert. He has over three decades of engineering and management experience in geotechnical engineering, solid waste management, landfill engineering, construction quality assurance (CQA) services, and subsurface soil investigation/exploration programs (including embankment and MSE Wall evaluation). He is a licensed Professional Engineer in North Carolina, South Carolina, Virginia, Maryland, and Idaho. He belongs to several industry organizations, including ASCE, SWANA, USGBC, PENC, and is currently a Board Member of the International Solid Waste Association (ISWA).
      Mr. Law is experienced in closure design, LFG blower and flare foundation design, geotechnical and geosynthetic/soil material testing and analysis, resident/construction engineering and construction quality assurance services, project scheduling and construction cost estimate, foundation bearing/settlement analysis and design, liquefaction analysis, static and seismic slope stability analyses using STABL program, seismic permanent displacement analysis, geosynthetic reinforced slope, embankment and pavement design, writing of geotechnical soil reports, and construction completion certification reports.
      Mr. Law’s solid waste management experience also includes landfill gas collection and utilization as alternate energy, LFG equipment procurement for overseas, material recovery facilities, solid waste transfer station facilities, aerobic bioreactor landfill remediation, bioreactor slope stability analysis, leachate recirculation evaluations in obtaining RD&D permit, and many other major permit amendments for alternate bottom liner (including final cover system) and leachate collection systems through performance equivalency demonstrations using HELP and MULTIMED modeling throughout US.
      In 2012, he served as a panel judge at the US EPA’s Peer Review Panel Meeting for Grants: People, Prosperity, and the Planet – P3 – Phase II Competition in Washington D.C. for projects related to solid waste management, recycling and reused of materials, and the alternate renewable green energy sources. For the last 3 years since 2013, he served as a judge for the AAEES 2013 Excellence in Environmental Engineering & Science Awards E3 Competition, for entries in Research, Planning, Design, and Operations/Management categories. Other paper/publication review experience includes publishing papers at national and international conferences, as well as serving as a paper reviewer for the Editorial Board of the International Solid Waste Association (ISWA) on regular basis.
      Contact James at 919-662-3015 or

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Mr. Lawrence is a hydrogeologist with 20 years of experience in all aspects of hydrogeology. Mr. Lawrence leads the Texas solid waste landfill groundwater monitoring program for SCS.

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    • Mr. Lawrence is a hydrogeologist with 20 years of experience in all aspects of hydrogeology. Mr. Lawrence leads the Texas solid waste landfill groundwater monitoring program for SCS. He works to resolve problems that arise with groundwater monitoring, including assessment monitoring, corrective action, landfill gas, and alternate source demonstration issues. His primary focus for the last ten years has been on solid waste landfill groundwater and geology issues. Current responsibilities include supervising the sampling, data reporting, and statistical analysis for several city-owned municipal solid waste landfills. His job experience includes extensive permitting-related hydrogeologic characterizations of solid waste landfill sites. He is experienced with the design and implementation of Subtitle D groundwater monitoring systems, assessing groundwater geochemistry, soil and groundwater assessment investigations, risk reduction rules, landfill alternate liner design, groundwater modeling, design and implementation of numerous large dewatering systems, design of water supply wells, managing waste injection wells, managing CERCLA and RCRA investigations, and waste analysis/characterization programs.

Mr. Leadford has more than 9 years of experience in the air quality field. His specialties include air dispersion modeling, emission inventory production, GIS mapping, and air monitoring. Since joining SCS Engineers in February 2019, he has created emission inventories, submitted reports, and run air dispersion modeling on numerous landfills in the Pacific Northwest. Mr. Leadford is a Professional Engineer licensed in Oregon, and received his Bachelor’s of Science degree in Chemical Engineering from the Unviersity of Colorado. He is also a licensed FAA Remote Pilot.

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    • Mr. Leadford has more than 9 years of experience in the air quality field. His specialties include air dispersion modeling, emission inventory production, GIS mapping, and air monitoring. Since joining SCS Engineers in February 2019, he has created emission inventories, submitted reports, and run air dispersion modeling on numerous landfills in the Pacific Northwest. Mr. Leadford is a Professional Engineer licensed in Oregon, and received his Bachelor’s of Science degree in Chemical Engineering from the Unviersity of Colorado. He is also a licensed FAA Remote Pilot.
      Mr. Leadford has submitted semi-annual and annual reports for a dozen landfills in the Pacific Northwest to comply with NSPS Subpart WWW as well as state regulations, and has calculated and submitted greenhouse gas reports to comply with 40 CFR Part 98 and state requirements.

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Mr. Lebron is the Business Unit Director of SCS Engineers’ Southeast Region (Florida, Georgia, and Alabama). He has broad and diverse experience in solid waste engineering including projects in landfill gas, groundwater, landfill services and solid waste facilities.

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    • Mr. Lebron is the Business Unit Director of SCS Engineers’ Southeast Region (Florida, Georgia, and Alabama). He has broad and diverse experience in solid waste engineering including projects in landfill gas, groundwater, landfill services and solid waste facilities. Mr. Lebron has been practicing solid waste engineering since 1999 and has worked on projects in more than half the country. He has experience in landfill gas collection systems and landfill gas to energy projects all across the Country. He has experience on over one hundred landfill gas projects; these include evaluation, design, permitting, construction, operation.
      Mr. Lebron has led a solid waste group that has experience in construction management and oversight of not only landfill and landfill gas collection systems but soil vapor extraction systems and other solid waste construction projects. He has extensive experience with Title V permitting and other regulatory requirements associated with landfill gas collection systems such as NSPS and NESHAP.

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Mr. Lefebvre is a Project Director in our Boca Raton, FL, office. He has over three decades of experience as an environmental engineer and consultant. He specializes in a broad range of environmental remediation services for federal, state, local government, and private sector clients, including remedial action plan lans, multi-media contamination assessments, industrial wastewater treatability studies and designs, and expert witness testimony. Mr. Lefebvre is a Professional Engineer licensed in Florida, Alabama, Georgia, Kansas, Massachusetts, Michigan, North Carolina, Ohio, and South Carolina.

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    • Mr. Lefebvre is a Project Director in our Boca Raton, FL, office. He has over three decades of experience as an environmental engineer and consultant. He specializes in a broad range of environmental remediation services for federal, state, local government, and private sector clients, including remedial action plan lans, multi-media contamination assessments, industrial wastewater treatability studies and designs, and expert witness testimony. Mr. Lefebvre is a Professional Engineer licensed in Florida, Alabama, Georgia, Kansas, Massachusetts, Michigan, North Carolina, Ohio, and South Carolina.
      At his previous firm, Mr. Lefebvre was vice president of engineering and also managed the Ft. Lauderdale, Florida, office, which was one of the most profitable offices in the company for over 15 years.

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Mr. Legaspi is a Vice President and O&M Region Manager, West Region, responsible for the following counties in California: Orange County, San Bernardino County, Imperial County, and Riverside County. He is a Senior Project Manager with nearly 20 years of experience in planning, directing, and implementing landfill gas (LFG) and groundwater operation, maintenance, and monitoring (OM&M) and construction projects, particularly related to LFG and groundwater extraction and treatment systems.

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Dr. Lemaster is a Senior Project Manager in our SCS Tracer Division. She is responsible for the documentation of Process Safety Management Programs (PSM) / Risk Management Programs (RMP) / California Accidental Release Prevention Programs (CalARP) projects for regulated facilities using hazardous materials. She has a Bachelor’s Degree in Chemical Engineering, and recently earned her Masters and PhD in NanoEngineering from the University of California, San Diego.

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    • Dr. Lemaster is a Senior Project Manager in our SCS Tracer Division. Her main area of concentration is risk analysis. The main focus of her work is the preparation and completion of multiple projects and general risk analysis work for many clients. She has a Bachelor’s Degree in Chemical Engineering, and recently earned her Masters and PhD in NanoEngineering from the University of California, San Diego.
      Dr. Lemaster is responsible for the documentation of Process Safety Management Programs (PSM) / Risk Management Programs (RMP) / California Accidental Release Prevention Programs (CalARP) projects for regulated facilities using hazardous materials. This work includes preparing the program documentation for compliance with the PSM/RMP/CalARP regulations, leading Process Hazard Analyses (PHA) studies, completing Hazard Assessments, providing CalARP implementation training, developing Piping and Instrumentation Diagrams, conducting Seismic Assessments, and producing project-related technical reports.

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Mr. Leon is a Project Director for our OM&M Division. He specializes in Remote Monitoring and Control.

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    • Mr. Leon is a Project Director for our OM&M Division. He specializes in Remote Monitoring and Control.

Michelle Leonard
Senior Vice President/Project Director/National Expert on Solid Waste Planning and Recycling
Pasadena, CA
National Expert: Solid Waste Planning and Recycling; Sustainability
O. (626) 792-9593

Ms. Leonard is a Senior Vice President of SCS Engineers and our National Expert in Solid Waste Planning & Recycling and Sustainability. She has over 30 years of experience in environmental consulting and project management, with emphasis in Sustainable Materials Management, including solid waste management planning and facilities.

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    • Michelle Leonard is a Senior Vice President of SCS Engineers and our National Expert in Solid Waste Planning & Recycling and Sustainability. She has over 30 years of experience in sustainable materials management, including environmental consulting and project management with an emphasis on solid waste management planning and facilities. She has assisted public and private sector clients in the preparation of solid waste management plans; designed and implemented waste reduction, recycling, and reuse programs; and evaluated existing programs to identify opportunities to reduce, reuse, and recycle solid waste. Ms. Leonard has prepared plans and permits for transfer stations, material recovery facilities, and drop-off and buy-back centers. As part of these projects, she has completed environmental impact assessments, facility permit applications, odor and dust control plans, and other support documents. Ms. Leonard has a strong working knowledge of solid waste management regulations and practices, and has presented numerous successful projects to city, county, and state regulators.
      Ms. Leonard is a member of the Solid Waste Association of North America (SWANA), including International Board Immediate Past President; Past Director of SWANA’s Recycling and Special Waste Technical Division; and is on the Board of Directors of SWANA’s Southern California Founding Chapter (2009 to present). She is also a Past Director of the Southern California Waste Management Forum and Past President of the Women’s Environmental Council.
      Contact Michelle at 626-792-9593 or

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Mr. LeTendre is experienced in landfill gas issues and operation of landfill control systems at solid waste landfill facilities. Responsibilities include operation and maintenance services that range from daily to quarterly monitoring at closed landfills and a wastewater treatment plant.

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    • Mr. LeTendre is experienced in landfill gas issues and operation of landfill control systems at solid waste landfill facilities. Responsibilities include operation and maintenance services that range from daily to quarterly monitoring at closed landfills and a wastewater treatment plant. Other operation and maintenance services which were provided include quarterly ground water monitoring, gas well balancing, repair and troubleshooting of landfill gas system equipment, system modifications, gas system compliance record keeping, emit ion logs, and provide technical support. He provides routine services which include testing monitoring wells, extraction well, header lines, and blower/flare station data collection, extraction well balancing and adjustment; blower/flare station adjustment and maintenance; and extraction system troubleshooting and repair. Other work includes non-routine scheduled repair and emergency call-out response.

Mr. Lewallen has experience managing both construction and OM&M projects, including wellfield assessment & tuning, procurement, estimating, scheduling, budgeting, monitoring data analysis and sub-contractor management, as well as other administrative activities. He has been responsible for estimating and managing a wide range of landfill gas control system upgrades and expansion projects for both private and municipal entities. His specific experiences include work related to LFG collection systems monitoring and construction, extraction well construction, flare installations/upgrades, polyethylene (PE) pipe fusion, polyvinyl chloride (PVC) pipe installation, horizontal collection trenches, and condensate collecting/containment systems.

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    • Prior to joining SCS Field Services, Mr. Lewallen worked in the residential and commercial construction industry for 13 years overseeing the construction of custom homes, residential communities, and commercial buildings in and around the Dallas/Fort Worth, Texas area. During his tenure as Project Manager, Mr. Lewallen managed large residential projects with responsibilities including project budgeting, scheduling, sub-contractor negotiations/management, vendor procurement, client communications, and design management.
      In 2008, Mr. Lewallen joined the SCS team and merged his construction experience with his formal educational training and is now holding the position of Project Manager over landfill construction projects.
      Mr. Lewallen currently provides SCS Field Services with expertise in construction management including procurement, estimating, scheduling, budgeting, and sub-contractor management, as well as other administrative activities.
      Mr. Lewallen has been responsible for estimating and managing the construction on a wide range of landfill gas control system upgrades and expansion projects for both private and municipal entities. His specific experiences include work related to LFG collection systems, extraction well construction, flare installations/upgrades, polyethylene (PE) pipe fusion, polyvinyl chloride (PVC) pipe installation, horizontal collection trenches, and condensate collecting/containment systems.

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Mr. Lewis is a Vice President of SCS and has been with SCS Field Services since 1987. Mr. Lewis’s long career at SCS started as a field technician maturing to a Vice President and Regional Manager. He leads construction, operation, and repair of environmental pollution control facilities and remediation projects.

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    • Mr. Lewis is a Vice President of SCS and has been with SCS Field Services since 1987. Mr. Lewis’s long career at SCS started as a field technician maturing to a Vice President and Regional Manager. He leads construction, operation, and repair of environmental pollution control facilities and remediation projects. Most of this SCS experience has involved the construction of new and expanded landfill gas (LFG) collection, flaring and utilization systems.
      Many projects involve major overhauls and repairs. LFG projects under Mr. Lewis’ direction have included landfill gas to energy facilities, compressor stations, off-site landfill gas pipelines for direct use, gas extraction well installations, collection header lines, polyethylene (PE) pipe fusion, polyvinyl chloride (PVC) pipe installation, installation of condensate/leachate containment and collection facilities, installation of blower/flare station mechanical equipment (including concrete pads, blowers, flares, compressors, conden¬sate tanks, pumps, flame arrestors, electrical panels, etc.), repair of landfill cover systems, erosion and sediment controls, and landfill revegetation.
      Mr. Lewis’ construction experience also includes numerous remediation projects. These projects include underground storage tank (UST) excava¬tion and removal, chemical and petroleum contaminated soil excavation, transportation, and disposal, construc¬tion of soil vapor extraction systems (VES), including installation of air monitoring facilities at a state Superfund site, and construction of a combination VES/biotreatment system.

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Mr. Liggins is a Vice President and Controller of SCS Engineers. He is a certified public accountant with over ten years of experience in related financial positions with service driven companies. Mr. Liggins has a Masters degree in Taxation from Golden Gate University and a BA in Business Management and Accounting from Western Michigan University, Haworth College of Business.

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    • Mr. Liggins is a Vice President and Controller of SCS Engineers. He is a certified public accountant with over ten years of experience in related financial positions with service driven companies. Mr. Liggins has a Masters degree in Taxation from Golden Gate University and a BA in Business Management and Accounting from Western Michigan University, Haworth College of Business. As the accounting officer at SCS, he is responsible for ensuring effective and efficient recording of accounting transactions, as well as monitoring adherence to established operating procedures and internal controls.

Mr. Lindemuth has over 15 years of experience in Geographic Information Systems (GIS) and Cartography. He began his career as a topographic analyst for the US Army by learning geospatial/GIS fundamentals attending the National Geospatial Intelligence Agency. His experience include applying GIS technology to environmental, assets management, military (DoD), utility/pipeline (oil and gas), and telecommunications industries.

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    • Mr. Lindemuth has over 15 years of experience in Geographic Information Systems (GIS) and Cartography. He began his career as a topographic analyst for the US Army by learning geospatial/GIS fundamentals attending the National Geospatial Intelligence Agency. His experience include applying GIS technology to environmental, assets management, military (DoD), utility/pipeline (oil and gas), and telecommunications industries.
      Mr. Lindemuth has experience with GIS commercial software (ESRI, MapInfo) products and GIS open source software products; some programming language experience (Python, JavaScript, SQL, .NET); and experience implementing enterprise GIS systems utilizing open source and ESRI products.

Mr. Linehan is a Senior Project Manager responsible for overseeing solid waste and environmental services projects from the SCS Oklahoma City and Wichita offices. He has a broad range of expertise, including solid and hazardous waste regulations, landfill design, and regulatory compliance. Mr. Linehan has participated in or directed numerous projects including: landfill projects, compliance audits, storm water modeling and design, remedial action plans, remedial systems designs, site investigations, health and safety assessments, waterway crossing assessments, and construction projects. Project sites have included solid waste facilities, active and closed landfill sites, oil well fields, fuel storage facilities, vehicle maintenance facilities, truck stops, industrial sites, and agricultural sites. He holds professional engineering licenses in Kansas, Missouri, Nebraska, and Oklahoma.

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    • Mr. Linehan is a Senior Project Manager responsible for overseeing solid waste and environmental services projects from the SCS Oklahoma City and Wichita offices. He has a broad range of expertise, including solid and hazardous waste regulations, landfill design, and regulatory compliance. Mr. Linehan has participated in or directed numerous projects including: landfill projects, compliance audits, storm water modeling and design, remedial action plans, remedial systems designs, site investigations, health and safety assessments, waterway crossing assessments, and construction projects. Project sites have included solid waste facilities, active and closed landfill sites, oil well fields, fuel storage facilities, vehicle maintenance facilities, truck stops, industrial sites, and agricultural sites. He holds professional engineering licenses in Kansas, Missouri, Nebraska, and Oklahoma.

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Ms. Liptak is a Project Professional with experience in regulatory compliance including Title V air permitting, annual and semi-annual compliance reporting, and review of monthly landfill gas data.

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Dr. Lister has nearly 30 years of professional experience in geology and hydrogeology. His experience includes groundwater investigations at active and inactive industrial facilities; active, inactive, and planned solid waste disposal sites; and state and federal Superfund sites.

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    • Dr. Lister has nearly 30 years of professional experience in geology and hydrogeology. His experience includes groundwater investigations at active and inactive industrial facilities; active, inactive, and planned solid waste disposal sites; and state and federal Superfund sites.

Mr. Lock is a Vice President of SCS. He has over 30 years of experience in landfill gas (LFG) collection system operation and maintenance (O&M), environmental regulatory compliance, site assessment, and post-closure care. He manages technical staff working on projects throughout the Northeastern United States.

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    • Mr. Lock is a Vice President of SCS. He has over 30 years of experience in landfill gas (LFG) collection system operation and maintenance (O&M), environmental regulatory compliance, site assessment, and post-closure care. He manages technical staff working on projects throughout the Northeastern United States.
      His background includes developing and/or evaluating monitoring equipment; actively participating in planning and management of research and development and construction projects; managing ongoing environmental sampling and monitoring programs; reviewing gas system construction designs; managing LFG collection system O&M; developing and delivering technical training sessions; evaluating, coordinating, and tracking expenses; and hiring and evaluating engineering technicians.
      Formerly with the Los Angeles County Sanitation Districts (LACSD), Mr. Lock managed a staff of 20 engineering technicians at several landfills in the County. He was responsible for O&M of the gas collection systems at two landfills, including flaring stations, condensate and leachate collection systems, and odor control systems. Both sites supplied fuel to gas-to-energy or compressed gas facilities. Other responsibilities included groundwater quality and runoff monitoring at six landfills, a transfer station, and a refuse-to-energy plant; regulatory compliance monitoring of surface gas emissions and ambient air at two landfills; and ash sampling at a refuse-to-energy plant.

Ms. Luu is a Project Professional for our Tracer Environmental division. She has 2 years of experience in ambient air monitoring in both an academic setting and the public sector, as well as 4 years of qualitative and quantitative data analysis experience. She has analyzed air quality data—such as sulfur compounds, formaldehyde, and heavy duty diesel related pollutants—from the South Coast Air Basin, to London, to the highest peak in Germany.

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    • Ms. Luu is a Project Professional for our Tracer Environmental division. She has 2 years of experience in ambient air monitoring in both an academic setting and the public sector, as well as 4 years of qualitative and quantitative data analysis experience. She has analyzed air quality data—such as sulfur compounds, formaldehyde, and heavy duty diesel related pollutants—from the South Coast Air Basin, to London, to the highest peak in Germany.
      Her responsibilities include the routine operation and inspection of air monitoring stations as well as the calibration and operation of pollutant analyzers, meteorological sensors, chart recorders, data acquisition systems, computers and their associated software and peripherals. Additionally, she compiles monthly air monitoring reports and submits validated, processed data for air monitoring stations to the California Air Resource Board and the Santa Barbara County APCD.

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