Staff

Denise Wessels, PE, is a Vice President of SCS Engineers, and a Project Director with our Landfill Engineering Group in the Reading, PA office. She has over two decades of experience in the waste management industry and environmental consulting, including landfill design, project management, regulatory compliance, permitting, environmental monitoring and studies, auditing, and budgeting.

    • Denise Wessels, PE, is a Vice President of SCS Engineers, and a Project Director with the Landfill Engineering Group in the Reading, PA office. She has over two decades of experience in the waste management industry and environmental consulting, including landfill design, project management, regulatory compliance, permitting, environmental monitoring and studies, auditing, and budgeting.

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Ms. Whitmer is an Environmental Scientist and Project Manager with SCS Engineers. She has over seventeen years of experience in environmental consulting. Project experience includes site assessments, extent of contamination studies, landfill flare and gas monitoring systems, groundwater sampling and statistical analysis of groundwater data, regulatory compliance, and NPDES services.

    • Ms. Whitmer is an Environmental Scientist and Project Manager with SCS Engineers. She has over seventeen years of experience in environmental consulting. Project experience includes site assessments, extent of contamination studies, landfill flare and gas monitoring systems, groundwater sampling and statistical analysis of groundwater data, regulatory compliance, and NPDES services.
      Ms. Whitmer has worked with several solid waste disposal facilities in Arkansas to help bring the Landfills into compliance with applicable Federal and State solid waste regulations. In particular, she has prepared several groundwater sampling and analysis plans, statistical and contingency plans, and explosive gas monitoring plans for several landfill sites.
      Ms. Whitmer also has extensive experience in managing groundwater sampling, statistics utilizing Sanitas for GroundwaterTM and DumpstatTM statistical programs, reporting, and compliance associated with solid and hazardous waste landfills. In addition, she has performed many geologic, hydrogeologic, and compliance projects associated with solid and hazardous waste landfills.

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Mr. Wiens is a project engineer with experience in the civil and environmental engineering fields. His project experience includes landfill design and permitting, environmental monitoring, landfill construction, agriculture biogas capture design and many other facets of environmental compliance.

    • Mr. Wiens is a project engineer with experience in the civil and environmental engineering fields. His project experience includes landfill design and permitting, environmental monitoring, landfill construction, agriculture biogas capture design and many other facets of environmental compliance.

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Mr. Wilcox is experienced in the operation, monitoring and sampling of groundwater corrective action systems. His expertise includes groundwater sampling and environmental control system operation to meet Bay Area and Central Valley APCD, Title V, RWCQB, and state regulations and requirements.

    • Mr. Wilcox is experienced in the operation, monitoring and sampling of groundwater corrective action systems. His expertise includes groundwater sampling and environmental control system operation to meet Bay Area and Central Valley APCD, Title V, RWCQB, and state regulations and requirements.
      Mr. Wilcox’s experience includes implementation of sampling plans and maintenance required to keep the systems operational and in compliance with various prescribed operating parameters and goals; performance, supervision, and/or assistance in required maintenance and repairs; and interaction with and/or management of subcontractors, laboratories, and vendors needed to assist with maintenance and sampling of the systems. He is also responsible for preparing daily field logs, recording field observations, preparing samples for shipment, and recommending actions to be taken.

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Lisa Wilkinson, PE, is a Vice President and Project Manager at SCS with nearly three decades of experience in landfill engineering design, landfill gas (LFG), permitting, civil and environmental engineering, financial feasibility evaluations, storm water design, and construction quality assurance at landfills and solid waste facilities. Ms. Wilkinson also has experience working on foundation and structural design teams for various facilities, and she is proficient in the computerized analysis of engineering designs. She is a licensed Professional Engineer in New York, Pennsylvania, and Vermont.

    • Lisa Wilkinson, PE, is a Vice President and Project Manager at SCS with nearly three decades of experience in landfill engineering design, landfill gas (LFG), permitting, civil and environmental engineering, financial feasibility evaluations, storm water design, and construction quality assurance at landfills and solid waste facilities.
      Ms. Wilkinson also has experience working on foundation and structural design teams for various facilities, and she is proficient in the computerized analysis of engineering designs.
      She is a licensed Professional Engineer in New York, Pennsylvania, and Vermont, and has a Master’s Degree in Environmental Engineering.

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Ron Wilks is a Vice President. He has a degree in business administration (marketing and personnel management) and has over four decades of experience. His technical expertise is environmental compliance relating to landfills. He is responsible for training personnel in the Field Services Southwest and Southeast Regions, and he is active with the SWANA LFG Training and Field Practices Committee. Mr. Wilks is a client services manager for all aspects of projects the include design requirements, coordination of designs, construction implementation, and operations management. He is also the primary system troubleshooter and investigator for LFG and leachate management systems.

    • Ron Wilks is a Vice President. He has a degree in business administration (marketing and personnel management) and has over four decades of experience. His technical expertise is environmental compliance relating to landfills. He is responsible for training personnel in the Field Services Southwest and Southeast Regions, and he is active with the SWANA LFG Training and Field Practices Committee. Mr. Wilks is a client services manager for all aspects of projects the include design requirements, coordination of designs, construction implementation, and operations management. He is also the primary system troubleshooter and investigator for LFG and leachate management systems.
      Contact Ron at 817-358-6104 or

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Mr. Williams has experience with the design and build of digester gas to RNG facilities throughout the United States. He has also worked in the construction industry, specifically in the areas of plumbing and natural gas utility distribution.

    • Mr. Williams has experience with the design and build of digester gas to RNG facilities throughout the United States. He has also worked in the construction industry, specifically in the areas of plumbing and natural gas utility distribution.

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Thomas Williams, EIT, is responsible for technical project work, including the preparation of engineering drawings and calculations for landfill engineering, landfill gas management, landfill environmental systems, and other environmental projects. He conducts solid waste permitting, landfill cell design, landfill gas system design, airspace calculations, CQA, stormwater analysis, and cost estimations for municipal and private clients. He has also manages landfill design and construction administration tasks.

    • Thomas Williams, EIT, is responsible for technical project work, including the preparation of engineering drawings and calculations for landfill engineering, landfill gas management, landfill environmental systems, and other environmental projects. He conducts solid waste permitting, landfill cell design, landfill gas system design, airspace calculations, CQA, stormwater analysis, and cost estimations for municipal and private clients. He has also manages landfill design and construction administration tasks.

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Eric Williams has four decades of experience in the environmental industry as a senior executive and project director. His experience spans all facets of environmental consulting focusing on serving public and private sector clients facing the complex issues associated with environmentally-challenged real estate. Eric has particularly deep experience with redevelopment of brownfield properties, having spent almost half of his career as a developer of brownfield sites. His focus area is the southwestern U.S., and he is also a national resource on redevelopment.

    • Eric Williams has four decades of experience in the environmental industry as a senior executive and project director. His experience spans all facets of environmental consulting focusing on serving public and private sector clients facing the complex issues associated with environmentally-challenged real estate. Eric has particularly deep experience with redevelopment of brownfield properties, having spent almost half of his career as a developer of brownfield sites. His focus area is the southwestern U.S., and he is also a national resource on redevelopment.

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Mr. Woloszyn is a Senior Project Professional with SCS Engineers and is based in the Harrisburg, Pennsylvania office. Since joining with SCS in 2017, has reviewed contract submittals for approval, assisted with report documentation for NSPS reports to the EPA, prepared design plans for landfill gas collection and leachate force main systems, conducted aerial UAS topography scans, UAS 3D modeling, and has provided construction quality assurance for of gas extraction wells with related conveyance piping systems as well as engineered final cover systems.

    • Mr. Woloszyn is a Senior Project Professional with SCS Engineers and is based in the Harrisburg, Pennsylvania office. Since joining with SCS in 2017, has reviewed contract submittals for approval, assisted with report documentation for NSPS reports to the EPA, prepared design plans for landfill gas collection and leachate force main systems, conducted aerial UAS topography scans, UAS 3D modeling, and has provided construction quality assurance for of gas extraction wells with related conveyance piping systems as well as engineered final cover systems.

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Mr. Wu brings over two decades of construction management and leadership experience. He has a comprehensive background working in construction, architecture, and business. Mr. Wu has organized, coordinated and managed residential and commercial construction projects in Taiwan, China, and the United States. He is fluent in English, Mandarin, Taiwanese, and Shanghainese.

    • Mr. Wu brings over two decades of construction management and leadership experience. He has a comprehensive background working in construction, architecture, and business. Mr. Wu has organized, coordinated and managed residential and commercial construction projects in Taiwan, China, and the United States. He is fluent in English, Mandarin, Taiwanese, and Shanghainese.

Mr. Yang is a Project Director in our Raleigh, North Carolina, office, providing landfill engineering and solid waste management consulting services to the Carolinas and beyond. He has over 19 years of experience in civil and environmental engineering, with expertise in landfill siting and permitting; and facility design, operations, and construction management for municipal solid waste landfills (Subtitle D), CDD landfills, utility coal ash landfills, and household hazardous waste and multi-material waste and recycling convenience centers. He has Bachelor’s and Master’s Degrees in Environmental Engineering from the University of Florida at Gainesville, and is a licensed Professional Engineer in North Carolina.

    • Mr. Yang is a Project Director in our Raleigh, North Carolina, office, providing landfill engineering and solid waste management consulting services to the Carolinas and beyond. He has over 19 years of experience in civil and environmental engineering, with expertise in landfill siting and permitting; and facility design, operations, and construction management for municipal solid waste landfills (Subtitle D), CDD landfills, utility coal ash landfills, and household hazardous waste and multi-material waste and recycling convenience centers. He has Bachelor’s and Master’s Degrees in Environmental Engineering from the University of Florida at Gainesville, and is a licensed Professional Engineer in North Carolina.
      Mr. Yang is experienced in solid waste facility site development projects, leachate management, and environmental regulatory compliance, including air quality for landfills; landfill gas collection, control design, and operations. He has conducted a variety of solid waste management assessments and planning projects and sanitary sewer rehabilitation design and construction management.
      He has worked with numerous counties and cities throughout North Carolina, serving as the client contact in addition to managing capital improvement projects, annual environmental compliance assistance, solid waste management plans, and on-call services.
      Kenton conducted landfill site selection and site suitability permitting for a coal ash landfill for a power utility in the southeast, as well as design, permitting, and construction management for two of its phases. He assisted in landfill operational issues, including stormwater control and leachate management, and was responsible for site compliance associated with EPA’s CCR rule.

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Kevin Yard, PE, is a Vice President and a Senior Project Advisor with over 30 years of engineering experience encompassing a broad range of projects, including feasibility studies, permitting projects, conceptual designs, construction plans and specifications, construction-related services, and operations consulting.

    • Mr. Yard has over 30 years of engineering experience encompassing a broad range of projects, including feasibility studies, permitting projects, conceptual designs, construction plans and specifications, construction-related services, and operations consulting. including feasibility studies, permitting projects, conceptual designs, construction plans and specifications, construction-related services, and operations consulting. He has served as engineer-of-record in the design and permitting various waste management facilities, including new landfills, landfill expansions, transfer stations, composting facilities, landfill gas (LFG) recovery/control plants, landfill closures, and material recovery facilities. In addition, he has conducted landfill operations courses and has made significant contributions to numerous operating facilities. In particular, through completing numerous feasibility studies and related financial analyses, he has assisted clients in assessing financial returns on various solid waste projects across a broad range of investment values and geographic locations.
      Having worked in numerous states, he has developed considerable expertise in implementing the solid waste, air quality, and stormwater rules under the jurisdiction of various state agencies. Mr. Yard is a registered professional engineer in six states. Mr. Yard has authored numerous technical papers and has presented expert testimony before legislative committees, district court and at numerous permit hearings. In addition, he formerly served as the Director of the Landfill Management Technical Division of the Solid Waste Association of North America (SWANA).

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