Kate Graf, P.E.

Kate Graf is a Principal Engineer based in Pennsylvania with more than 20 years of experience focused on providing air quality services to industrial clients. Her experience spans environmental engineering…

Gavin Grant, Ph.D., PEng

Gavin Grant is a Senior Principal Geological and Civil Engineer based in Ontario with more than 15 years of experience focused on the fate and behavior of dense non-aqueous phase…

Duane Graves, Ph.D.

Duane Graves is a Senior Principal Scientist based in Tennessee with more than 30 years of experience focused on environmental biotechnology; environmental forensics; in situ groundwater, soil, and sediment remediation;…

Scott Graves, P.E.

Scott Graves is a Senior Principal Engineer based in Texas with more than 25 years of experience focused on geotechnical, environmental, and water resources engineering. Scott specializes in landfill design…

Alexander Greene, P.G., C.E.G.

Alex Greene is a Senior Principal Engineering Geologist based in California with more than 25 years of professional experience focused on engineering geology, geotechnical engineering, and water resources management.

Christopher Greene, P.E.

Christopher Greene is a Senior Principal Environmental Engineer based in Massachusetts with more than 20 years of experience focused on managing, designing, and constructing remediation projects. His experience includes investigation,…

Leslie Griffin, P.E.

Leslie Griffin is a Senior Principal Civil Engineer based in Georgia with more than 20 years of experience focused on the design and construction of large, multi-disciplinary projects involving waste…

Mark Grivetti, P.G., CHG, CEG, REA

Mark Grivetti is a Senior Principal Hydrogeologist based in California with more than 30 years of experience focused on characterization and remediation of hazardous waste sites, surface and groundwater resource…

Beth Gross, Ph.D., P.E., D.GE, F.ASCE

Beth Gross is a Senior Principal Geotechnical Engineer based in Texas with more than 25 years of experience focused on environmental site characterization and management, as well as siting, design,…

Todd Hagemeyer, P.G.

Todd Hagemeyer is a Senior Principal Hydrogeologist based in Georgia with more than 25 years of experience focused on development of environmental management solutions for the manufacturing and service facilities…

Mark Hanna, Ph.D., P.E., LEED AP

Mark Hanna is a Senior Principal Water Resources Engineer based in Southern California with more than 25 years of experience focused on water and natural resources. His experience in civil…

Kathleen Harrison, P.G. QSP, QSD, QISP, ToR, REA

Kathleen Harrison is a Principal Geologist based in California with more than 20 years of experience focused on watershed management, stormwater pollution prevention, and erosion control. She is a significant…

Phil Harvey, P.G.

Phil Harvey is a Senior Principal Hydrogeologist based in Missouri with more than 38 years of experience focused on the evaluation and remediation of contaminated sites. Phil has assisted clients…

Elisabeth Hawley, P.E.

Elisabeth Hawley is a Senior Consultant based in northern California with 16 years of experience advancing environmental remediation projects involving site characterization, fate and transport, remediation, strategies to achieve site…

Michael Hayes, P.E.

Michael Hayes is a Principal Civil Engineer based in Pennsylvania with more than 20 years of experience focused on remediation of hazardous waste sites; brownfields redevelopment; water and wastewater treatment;…

Anica Haynes

Anica Haynes is a Principal Environmental Consultant based in Louisiana and with more than 15 years of experience focused on diverse technical and project management experience in environmental consulting, primarily…

Tamara Hebeler, P.E.

Tamara Hebeler is a Principal Engineer based in Georgia with more than 19 years of experience focused on civil and environmental engineering. She has been involved in all aspects of…

Dan Heidenreich, CPG

Dan Heidenreich is a Senior Consultant Geologist based in Colorado with more than 20 years of experience focused on GIS data management and mapping. He also conducts 3D site visualizations,…

J. Chris Herin, P.G.

J. Chris Herin is a Senior Principal Hydrogeologist practitioner in the field of environmental risk management and minimization based in Florida with more than 30 years of environmental consulting experience,…

Nathan Higgerson

Nathan Higgerson is a Principal based in Missouri with more than 18 years of experience in both the consulting and private industries focused on fossil fuel and renewable power, mining,…

Dave Himmelheber, Ph.D., P.E.

Dave Himmelheber is a Principal Engineer based in New Jersey with more than 17 years of experience with contaminated sediments focused on site investigations and remedial design for complex, multiple…

Brian Hitchens, P.G., CHG

Brian R. Hitchens is a Senior Principal Hydrogeologist based in California with more than 15 years of experience focused on the evaluation and improvement of groundwater and surface water impacted…

Beau Hodge, P.G.

Beau Hodge is a Senior Principal Geologist based in North Carolina with more than 25 years of experience focused on environmental site investigation and remediation with a focus on recalcitrant…

John Hollar, P.E.

John Hollar is a Principal Civil and Environmental Engineer based in Georgia with more than 25 years of experience advising a variety of industrial, power, and government clients in the…

George Hollerbach, P.E., BCEE, CSP

George Hollerbach is a Senior Principal Engineer based in New Jersey with more than 35 years of experience focused on water and wastewater, remediation, construction management, environmental health and safety…

Terence Holman, Ph.D., P.E.

Terry Holman is a Senior Principal Engineer with more than 25 years of professional experience focused on the areas of: geotechnical and geostructural engineering; design; construction management; specialty geotechnical construction;…

Michael Houlihan, P.E.

Michael Houlihan is a Senior Principal Engineer based in Maryland with more than 30 years of experience focused on industrial and municipal waste management, waste containment system design, geotechnical engineering,…

Yvana Hrovat, P.E.

Yvana Hrovat, P.E. is a Principal Engineer based in California with more than 16 years of professional experience as a project manager, water resources engineer, environmental scientist and compliance analyst…

Christopher Hunt, Ph.D., P.E., G.E.

Christopher Hunt is a Senior Principal Geotechnical Engineer based in California with more than 20 years of experience focused on managing and supporting a wide variety of geotechnical and geoenvironmental…

Amer Hussain, P.E.

Amer Hussain is a Principal Environmental Engineer based in California with more than 25 years of experience focused on groundwater assessment and remediation, regulatory compliance, and permitting. He specializes in…

Mehmet Iscimen, P.E., CPESC

Mehmet Iscimen is a Principal Engineer based in Georgia with more than 17 years of professional experience focused on the areas of geotechnical and geoenvironmental engineering, solid waste disposal facility…

Krzysztof S. Jesionek, P.E.

Krzysztof Jesionek is a Principal Environmental Engineer based in California with more than 35 years of experience focused on solid and hazardous waste management, including facility design and closure, permitting,…

Jill Johnson, P.G.

Jill Johnson is a Principal Hydrogeologist based in Florida with more than 20 years of experience focused on a wide range of environmental projects, including electric transmission life cycle services,…

Mark Johnson

Mark Johnson is a Principal Consultant based in Maryland with more than 23 years of experience focused on transactional support, site investigation and remediation, subsurface vapor intrusion to indoor air,…

Ronald Johnson, P.E., G.E.

Ronald Johnson is a Senior Principal Geotechnical Engineer based in California who has been focused on the most seismically active areas of the United States throughout his career. He has…

Marty Jones

Marty Jones is a Principal Environmental Scientist based in South Carolina with more than 35 years of professional experience focused on air quality permitting and compliance, environmental compliance auditing, due…
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