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 a Senior Project Advisor and SCS Engineers’ National Expert on Landfill Gas Modeling. He leads SCS’s non-regulatory landfill gas (LFG) recovery modeling services to support LFG-to-Energy and high-Btu methane utilization project development. Over the past 25 years, Mr. Stege developed and refined SCS’s U.S. LFG recovery model that leverages our companywide expertise in LFG collection to assess methane recovery more accurately. This model uses a database of over 1,300 years of measured LFG flows and SCS assessments of collection system performance at over 250 landfills to empirically define LFG model input assumptions. Mr. Stege has prepared domestic and international LFG modeling/due diligence studies for hundreds of landfills in the United States and around the world for the USEPA, World Bank, International Finance Corporation, landfill owners, municipalities, and LFG project developers.

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    • Mr. Stege is a Senior Project Advisor and SCS Engineers’ National Expert on Landfill Gas Modeling. He leads SCS’s non-regulatory landfill gas (LFG) recovery modeling services to support LFG-to-Energy and high-Btu methane utilization project development. Over the past 25 years, Mr. Stege developed and refined SCS’s U.S. LFG recovery model that leverages our companywide expertise in LFG collection to assess methane recovery more accurately. This model uses a database of over 1,300 years of measured LFG flows and SCS assessments of collection system performance at over 250 landfills to empirically define LFG model input assumptions. Mr. Stege has prepared domestic and international LFG modeling/due diligence studies for hundreds of landfills in the United States and around the world for the USEPA, World Bank, International Finance Corporation, landfill owners, municipalities, and LFG project developers.
      Mr. Stege 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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Ms. Schick is responsible for helping grow SCS’s Environmental Services team and our Brownfields redevelopment practice in the Southeast and Mid-Atlantic markets. Her expertise includes proposal development, helping public and private-sector clients navigate state and federal brownfields redevelopment and voluntary cleanup programs; overseeing the implementation of USEPA assessment and cleanup grants; executing and supporting programmatic management of brownfields grants, leading community engagement events; and delivering brownfields redevelopment project management, strategic vision, and leadership. She has a Master of Public Administration degree.

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    • Ms. Schick is responsible for helping grow SCS’s Environmental Services team and our Brownfields redevelopment practice in the Southeast and Mid-Atlantic markets. Her expertise includes proposal development, helping public and private-sector clients navigate state and federal brownfields redevelopment and voluntary cleanup programs; overseeing the implementation of USEPA assessment and cleanup grants; executing and supporting programmatic management of brownfields grants, leading community engagement events; and delivering brownfields redevelopment project management, strategic vision, and leadership.
      Her experience includes preparing successful brownfields grant applications; implementing and completing brownfields redevelopment projects; coordinating with private developers, regulatory agencies, community leaders and other partners; completing reporting requirements; developing proposals and work orders; project management, including manpower resource allocation, scheduling, budgets, invoicing, and progress reports; and communicating with stakeholders, regulators, and clients. Additional responsibilities include managing site information in the ACRES database, submitting quarterly and annual reports, and preparing closeout documents for submittal to USEPA.
      Contact Melissa at (251) 283-6440 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 diligence 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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Patrick Sullivan
Patrick Sullivan
Senior Vice President/Business Unit Director/National Expert on Clean Air Act - NSPS and on Odor Management
O. (916) 361-1297

Pat Sullivan, BCES, CPP, REPA, is a Senior Vice President of SCS Engineers and the Business Unit Director of our Southwest Region, encompassing California, Arizona, Nevada, Utah, and New Mexico. Pat is a Harvard-degreed scientist, a Registered Environmental Property Assessor (REPA), Board Certified Environmental Scientist (BCES), Certified Permitting Professional (CPP) in the South Coast Air Quality Management District (SCAQMD), and an accredited Lead Verifier under the California Air Resources Board (CARB) AB 32 Greenhouse Gas (GHG) programs. He is our National Expert on the Clean Air Act and the New Source Performance Standard (NSPS) and on Odor Management. He has over three decades of professional experience, all with SCS. He is also the Practice Leader for 01-SW’s Solid Waste Practice. He leads the firm’s strategic initiative for Sustainability, Greenhouse Gas, and the Clean Air Act. He is a member of the SCS Management Advisory Committee. He is active in 12 professional organizations, including National Waste and Recycling Association (NW&RA), Solid Waste Association of North America (SWANA), and Air and Waste Management Association. Pat is a member of the Hall of Flame for the SWANA LFG/Biogas Division and has received SWANA’s Distinguished Individual Achievement Award. He has also received NW&RA’s Distinguished Service Award and has published/presented over 120 papers and presentations in industry publications/ conferences. His technical expertise includes air permitting and compliance, GHG emissions and climate change, human health and ecological risk assessment, landfill investigation and redevelopment, and LFG engineering. He has also worked in the 01-SW Environmental Services (ES) group and formerly managed the Northern California ES practice.

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    • Pat Sullivan, BCES, CPP, REPA, is a Senior Vice President of SCS Engineers and the Business Unit Director of our Southwest Region, encompassing California, Arizona, Nevada, Utah, and New Mexico. He is our National Expert on the Clean Air Act and the New Source Performance Standard (NSPS). He also serves as the Practice Leader for SCS’s Solid Waste Practice in the Southwest, and he oversees companywide GHG and Risk Assessment programs. Mr. Sullivan has over three decades of environmental engineering experience (all with SCS), specializing in solid waste management and other environmental issues.
      Mr. Sullivan 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. He is a Senior Vice President and Member of the Company’s Management Advisory Committee.
      He is the Principal-in-Charge for projects related to air quality permitting and compliance, GHG emissions and climate change, LFG engineering and compliance, facility investigation and risk assessment, redevelopment of impacted properties, and soil and groundwater investigations at solid waste and other industrial facilities, as well as related engineering services. Mr. Sullivan has published and/or presented over 150 technical papers and/or presentations in industry journals, publications, conferences, seminar, and workshops.
      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.
      Contact Pat at 916-361-1297 or

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Paul Schafer
Paul Schafer
Vice President/Project Director/National Expert on Ambient Air Monitoring and on Odor Management
O. (619) 823-5333

Mr. Schafer is a Vice President, Project Director and our National Expert on Ambient Air Monitoring and on Odor Management. During his technical career at SCS and SCS Tracer Environmental, Mr. Schafer has served in 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.

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    • Mr. Paul Schafer is a Vice President, Project Director, and our National Expert on Ambient Air Monitoring and on Odor Management. During his technical career at SCS and SCS Tracer Environmental, Mr. Schafer has served in 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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Steven Stewart, PE, is our National Expert and Director for Sustainability responsible for project development and also serves as client account manager for numerous clients including those with a sustainability focus. Steven has with more two decades of experience within the Environmental Consulting and Manufacturing Industry providing strategic thinking related to project planning, regulatory strategy, and developing sustainability initiatives. His experience includes energy efficiency measures, GHG reduction, carbon sequestration, water re-use and stewardship, and solid waste minimization and recycling programs. Additional experience includes managing and performing permitting, compliance audits, developing environmental management systems, long-term environmental planning, environmental and sustainability capital projects. He also has served as Environmental Manager and Capital Projects Portfolio manager at a large steel manufacturing facility which provides valuable experience to clients when project development and planning. Mr. Stewart is a licensed Professional Engineer in Alabama and Florida.

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    • Steven Stewart, PE, is our National Expert and Director for Sustainability responsible for project development and serving as client account manager for numerous clients including those with a sustainability focus. Steven has with more two decades of experience within the Environmental Consulting and Manufacturing Industry providing strategic thinking related to project planning, regulatory strategy, and developing sustainability initiatives. His experience includes energy efficiency measures, GHG reduction, carbon sequestration, water re-use and stewardship, and solid waste minimization and recycling programs. Mr. Stewart is a licensed Professional Engineer in Alabama and Florida.
      Additional experience includes managing and performing permitting, compliance audits, developing environmental management systems, long-term environmental planning, environmental and sustainability capital projects.
      He also has served as Environmental Manager and Capital Projects Portfolio manager at a large steel manufacturing facility which provides valuable experience to clients when project development and planning.

      See Full Resume