Danielle Thorson, P.Eng.
Danielle Thorson is a Senior Engineer based in Ontario with more than 15 years of experience in environmental consulting.
Gordon Thrupp, Ph.D., P.G., CHG
Gordon Thrupp is a Principal Hydrogeologist based in California with more than 25 years of experience focused on evaluating geological and hydrogeological conditions. He has specialized in quantitative analysis of…
Eric Tollefsrud, P.G.
Eric Tollefsrud is a Principal Hydrogeologist based in Minnesota with more than 30 years of environmental consulting experience focused on the characterization and remediation of soil, soil vapor, and groundwater…
Eryn Torres
Eryn Torres is a Principal Professional based in California with ten years of experience focused on subsurface analysis, including geological, hydrogeological, and chemical evaluations to support remediation, groundwater sustainability, and…
Denise Tripp
Denise Tripp is a Senior Consultant based in Massachusetts with more than 35 years of experience focused on environmental assessment and remediation and litigation support for clients in the paper,…
Jeffrey Tyburski, P.G.
Jeffrey Tyburski is a Senior Principal Geologist based in North Carolina with more than 36 years of experience focused on developing technically defensible and cost-effective solutions for environmental assessments, corrective…
Thomas Vainio-Mattila, PGeo., EurGeol.
Thomas Vainio-Mattila is a Principal Environmental Consultant based in Ireland and with more than 25 years of experience focused on environmental consulting in Ireland, the UK and Germany.
Brian Valleskey, CFM
Brian Valleskey is a Senior Professional based in Wisconsin with more than 20 years of experience in water resources initiatives related to dam safety, compliance, permitting, analysis, and removal.
Lisa Van Tassell, P.E.
Lisa Van Tassell is a Senior Principal Environmental Engineer based in California with more than 15 years of experience focused on soil and groundwater remediation systems; site investigation and characterization,…
David Vance, P.G.
David Vance is a Principal Geologist based in Georgia with more than 18 years of experience restoring riverine and coastal systems.
Matt Vanderkooy, P.Geo
Matt Vanderkooy is a Principal Contaminant Hydrogeologist based in Ontario with more than 12 years of experience focused on complex multidisciplinary challenges with a specialization in managing and directing per-…
Spencer D. Varnado
Spencer Varnado is a Senior Scientist based in Louisiana with more than 16 years of experience in environmental permitting and planning, ecological surveys, ecological restoration, and project management.
Srinivasa Varadhan, Ph.D., P.E., P.Eng.
Srini Varadhan is a Principal Environmental Engineer based in Ontario, Canada with more than 12 years of engineering, research, and consultation experience focused on large-scale and complex soil and groundwater…
Jesse Varsho, P.E., P.G.
Jesse Varsho is a Senior Principal Engineer and Geologist based in Illinois with more than 19 years of experience in environmental consulting, landfill engineering, construction quality assurance, permitting, compliance, and…
Robert Veenstra
Robert Veenstra is a Principal Environmental Consultant based in Missouri with more than 30 years of experience focused on developing and managing complex soil, groundwater, surface water and sediment investigation…
Berend Velderman, P. Geo
Berend Jan Velderman is a Senior Consultant based in Ontario with more than 30 years of experience in a variety of environmental projects including assessment and remediation of contaminated sites,…
Meena Viswanath, PE
Meena Viswanath is a Senior Engineer based in Maryland with more than 11 years of experience focused on waste containment design, geotechnical engineering and design, and geotechnical instrumentation and monitoring.
Fuad Wadud, PE
Fuad Wadud, PE, is a Principal Environmental Engineer based in Washington with more than 20 years of experience focused on air quality permitting and energy transition services.
Scott C. Walker
Scott Walker is a Senior Principal Ecologist based in Texas with more than 22 years of experience in project management, environmental impact assessment, ecological restoration, and environmental permitting and planning.
Annika Wallendahl, P.E., L.G., MBA
Annika Wallendahl is a Principal Engineer based in Washington with more than 20 years of experience focused on energy transition, environmental compliance, sustainability, and environmental engineering.
James Wang, Ph.D., P.E.
James (Yu-Sheng) Wang is a Principal Environmental Engineer based in Maryland with more than 25 years of experience focused on developing and applying innovative assessment and remediation technologies. James has…
Thomas Wanzek, PhD
Tom Wanzek is a Senior Staff Scientist based in Oregon with significant academic research experience focused on soil characterization, ecosystem restoration, and the fate and transport of per- and polyfluoroalkyl…
Kevin M. Warner, P.E.
Kevin Warner is a Principal Engineer based in Florida with more than 35 years of experience designing and implementing soil and groundwater treatment systems at hundreds of sites throughout the…
Nandra Weeks, P.E.
Nandra Weeks is a Senior Principal Environmental Engineer based in Florida with more than 30 years of professional experience focused on the engineering and remediation issues associated with environmentally-impaired property…
Benoit Wentzinger, CPEng, RPEQ
Benoit Wentzinger is a Principal Geotechnical Engineer based in Australia with over 20 years of experience focused on investigation, design, construction, and peer review to support dam design, stability assessments,…
Chris Wessel, PE, QSD/QSP
Chris Wessel is a Senior Principal Water Resources Engineer based in California with more than 15 years of experience focused on urban stormwater management and planning.
Chuck Whisman, P.E.
Chuck Whisman is a Senior Principal Engineer based in Pennsylvania with more than 27 years of professional experience helping his clients with their most challenging engineering, site development, and environmental…
Jimmy Whitmer, P.G., CHMM
Jimmy Whitmer is a Senior Principal Geologist and Hydrogeologist based in Georgia with more than 30 years of experience directing multidisciplinary projects focused on water supply development, site characterizations for…
Anju Wicke
Anju Wicke is a Senior Principal Scientist based in California with more than 25 years of experience in environmental consulting focused on program management, financial management, and contracting services for…
Kim Williams, P.E., CPSWQ
Kim Williams is a Senior Consultant Water Resources Engineer based in California with more than 25 years of experience focused on civil and environmental engineering.
Mark R. Willobee, CPESC
Mark is a Principal based in Illinois with more than 20 years of experience focused on water and natural resources management.
Matthew Wissler, P.G.
Matthew Wissler is a Senior Principal Hydrogeologist with more than 19 years of experience focused on the evaluation and permitting of water resources, hydrogeologic investigations relating to resource and waste…
Veryl Wittig, P.G., CHG
Veryl Wittig is a Senior Principal Hydrogeologist based in California with more than 25 years of experience focused on complex environmental site assessment, landfill and waste management facilities, hazardous materials…
Jim Wragg, FGS
Jim Wragg is a Senior Principal Hydrogeologist based in the United Kingdom with more than 30 years of experience focused on the detailed investigation, assessment and remediation of contaminated soil…
Kenneth Yass, P.E., CHMM
Ken Yass is a Principal Environmental Engineer based in Wisconsin with more than 25 years of experience focused on environmental compliance services for a wide range of industrial clients.
Nicholas Yafrate, Ph.D., P.E.
Nick Yafrate is a Principal Engineer based in Massachusetts with more than 11 years of experience in geotechnical engineering design, geotechnical instrumentation, and solid-waste facility services.
