National Experts

SCS professionals are active in, and leaders of industry and professional associations. We organize and participate in workshops and conferences, author and present technical papers, conduct research, and participate in national and state-level legislative and rule-making processes and regulatory policy. Our engineers, environmental consultants, and scientists work in close coordination on environmental solutions.

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Mr. Stege is SCS Engineers’ National Expert on Landfill Gas Modeling. He provides expertise evaluating landfill gas (LFG) to energy and landfill methane emission reduction projects based on the application of LFG models to project LFG recovery.

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    • Mr. Stege is SCS Engineers’ National Expert on Landfill Gas Modeling. He provides expertise evaluating landfill gas (LFG) to energy and landfill methane emission reduction based on the LFG models that project LFG recovery. Mr. Stege has supported the US EPA’s Landfill Methane Outreach Program (LMOP), as well as the World Bank, International Finance Corporation, landfill owners, municipalities and LFG project developers in assessing the feasibility and performance of LFG utilization projects. Mr. Stege leads SCS’s LFG modeling practice, and he prepares or reviews domestic and international LFG modeling and due-diligence studies for SCS offices throughout the US. He also trains SCS staff on LFG modeling and is responsible for the ongoing development of SCS’s domestic and international LFG models. SCS has an advanced LFG modeling practice due in large part to Mr. Stege’s work.
      Mr. Stege frequently presents on the application of LFG models to evaluate landfill methane generation and recovery at conferences hosted by organizations such as LMOP (numerous conferences); the Global Methane Initiative (GMI) Partnership [including Expos in China, India, and Canada]; the Solid Waste Association of North America (SWANA); the Environmental Research and Education Foundation (EREF); the Global Waste Management Symposium; and the International Solid Waste Association (ISWA). He has authored numerous international LMOP/GMI LFG models, and has provided training on their use. He has served as the Chairman of SWANA’s Generation and Modeling Committee for over a decade.
      Contact Alex at 602-840-2596 or

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Mr. Schmidt is a Project Director in our Suffern, NY, office and our National Expert in Environmental Insurance Claims and Underwriting. He is an accomplished leader with nearly 30 years of experience in the environmental consulting and environmental insurance industries, with specific experience focusing on the evaluation of environmental risks and liabilities associated with insurance claims and underwriting, site investigation and remediation, due diligence, project management, and marketing. Mr. Schmidt is responsible for the growth and management of our environmental services practice in the greater New York area.

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    • Mr. Schmidt is a Project Director in our Suffern, NY, office and our National Expert in Environmental Insurance Claims and Underwriting. He is an accomplished leader with nearly 30 years of experience in the environmental consulting and environmental insurance industries, with specific experience focusing on the evaluation of environmental risks and liabilities associated with insurance claims and underwriting, site investigation and remediation, due diligence, project management, and marketing. Mr. Schmidt is responsible for the growth and management of our environmental services practice in the greater New York area.
      Mr. Schmidt has planned, managed and executed dozens of investigations involving multiple media (i.e., soil, groundwater, surface water) and contaminants at a wide-variety of sites located throughout the eastern seaboard of the US. These sites have ranged in size and complexity from residential properties, to commercial/industrial facilities, to major military bases.
      Specific projects involved environmental activities associated with underground storage tank (UST) and above-ground storage tank (AST) releases, dry cleaners, ISRA closures, historic fill, linear project corridors, a variety of commercial and industrial sites, and Brownfields sites, including the management and oversight of the remediation of the most heavily arsenic-contaminated site in New Jersey. Remedial actions have included soil excavation, pump and treat, air sparging and soil vapor extraction (AS/SVE), and innovative soil stabilization methodology.
      Mr. Schmidt has significant due dilligence experience conducting and managing Phase I and Phase II ESAs and other environmental assessments of residential, commercial and industrial properties throughout the NY/NJ metropolitan area for real estate companies, lending institutions, developers, and private individuals. Mr. Schmidt meets the definition of an Environmental Professional (EP) under the EPA All Appropriate Inquiries regulations (40 CFR 312).
      Contact Mike at 845-918-5220 or .

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Mr. Sullivan, BCES, CPP, REPA, is a Senior Vice President of SCS Engineers and Business Unit Director of the Southwest Region. He is also our National Expert on the Landfill Clean Air Act and the New Source Performance Standard (NSPS). Mr. Sullivan has over 25 years of environmental engineering experience, specializing in solid waste-related issues.

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    • Mr. Sullivan, BCES, CPP, REPA, is a Senior Vice President of SCS Engineers and Business Unit Director of the Southwest Region. He is also our National Expert on the Landfill Clean Air Act and the New Source Performance Standard (NSPS).
      Mr. Sullivan has over 25 years of experience in the area of environmental engineering, specializing in solid waste management and other environmental issues. He is the Managing Director of SCS Engineers (SCS) consulting and engineering operations within the Southwestern United States, the largest of all of SCS’s engineering business units. He also serves as the Practice Leader for SCS’s Solid Waste Practice in the same region. Mr. Sullivan is the National Expert for SCS’s companywide Air Quality program. He also oversees SCS’s company-wide GHG and Risk Assessment programs and is one of the national experts on risk assessment and toxic exposure issues for solid waste facilities.Mr. Sullivan is a company Senior Vice President and Member of the Company’s Management Advisory Committee.
      He has worked closely with regulatory agencies on the federal, state and local level. His expertise has been developed managing large-scale contracts, programs, and projects on a state and national level. His management experience includes managing professional and field staff and all aspects of operational performance, customer service, and project management. He has an extensive knowledge of regulatory permitting and compliance. His Real Estate training has been pivotal in large scale property acquisitions, divestitures, and development in the oil and gas and renewable energy sectors.
      Mr. Sullivan is also Principal-in-Charge for projects related to solid waste facility investigation and risk assessment, redevelopment, LFG engineering, air quality permitting and compliance, GHG emissions, and groundwater investigations at solid waste and other industrial facilities, as well as related engineering services. He has published and/or presented over 100 technical papers in industry journals, publications, conferences, seminar, and workshops.
      Contact Pat at 916-361-1297 or

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Mr. Paul Schafer is a Vice President and Project Director at SCS Engineers and our National Expert on Ambient Air Monitoring. During his technical career at SCS and SCS Tracer Environmental, Mr. Schafer has assumed key roles on several nationally significant monitoring efforts.

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    • Mr. Paul Schafer is a Vice President and Project Director at SCS Engineers, and our National Expert on Ambient Air Monitoring. During his technical career at SCS and SCS Tracer Environmental, Mr. Schafer has assumed key roles on several nationally significant monitoring efforts. He has in-depth experience interfacing with regulatory agencies regarding the performance of monitoring systems, source emission tests, and continuous process monitors which are operated for our clientele. He has had direct working experience with the San Luis Obispo County APCD, San Joaquin Valley APCD, Imperial County APCD, South Coast AQMD, Santa Barbara APCD, San Diego County APCD, California Air Resources Board, EPA Region IX, and the General Services Administration regarding monitoring programs and air quality impact assessments. He is also experienced in liquids management.
      Mr. Schafer offers decisive management skills, which contribute to the success of monitoring programs under his purview. Cost control management and defensible technical performance are primary goals integral to all of the long-term monitoring programs that he manages. Mr. Schafer has developed close business relationships with manufacturers and vendors in the ambient air quality monitoring field.
      Contact Paul at 619-823-5333 or

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Solavann Sim
Solavann Sim
Vice President/Project Director/O&M Western Regional Manager/National Expert on Liquids Management
O. (562) 492-6222

Mr. Sim is a Vice President and one of SCS’s National Experts for Liquids Management; he is also O&M Region Manager for the western counties in California. He is responsible for the following counties: LA County, Kern County, Ventura County, San Luis Obispo County, and Santa Barbara County.

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    • Mr. Sim is a Vice President and one of SCS’s National Experts for Liquids Management; he is also O&M Region Manager for the western counties in California. He is responsible for the following counties: LA County, Kern County, Ventura County, San Luis Obispo County, and Santa Barbara County. He has over 10 years of engineering-related experience with Waste Management, Inc. (WM), and more recently with SCS Engineers (SCS). He has a strong background in construction and field operations, having served as superintendent of a family-owned construction company for several years. With WM, he managed the design and construction of landfill liner cells, landfill final cover systems, landfill gas (LFG) flare stations, and numerous LFG well and piping projects. He also assisted with permitting efforts for landfill expansions, has managed environmental and safety compliance at multiple WM sites in Southern California, and managed LFG operations, including 10 LFG technicians, across nine WM sites in Southern California and Hawaii. He is an expert in Zink Ultra-Low Emission and traditional enclosed flare operations, and has significant experience in hydrogen sulfide (H2S) treatment system design and operation. He has designed gas collection and control system (GCCS) 5-year and final closure build-out plans, with respect to site LFG generation rates and operational fill sequence, and has improved surface emissions and probe compliance at all WM landfills in Southern California. Mr. Sim has facilitated and taught WM’s Landfill Gas Technician Program, and conducted numerous in-house training programs for WM employees.
      Since joining SCS, Mr. Sim continues to be involved in permitting, design, construction, and operations and maintenance of LFG systems across the country. Mr. Sim is currently the project manager and engineer of record responsible for the operations and maintenance (O&M) of the Chiquita Canyon Landfill GCCS system. Chiquita Canyon Landfill has over 300 collection points, two LFG turbines, and two flares with condensate injection systems. In addition to his involvement in O&M projects Mr. Sim has also been involved in many GCCS design and construction projects across California, Oregon and Alaska since joining SCS. These projects include landfill final cover systems, flare installations, hydrogen sulfide treatment systems, condensate injection systems, and numerous landfill gas well installations.
      Contact Sol at 562-492-6222

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