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Ron Gestler

Ron Gestler is a Senior Scientist based in California with 18 years of professional experience in remediation services. He has participated at every level in the design, implementation, operation, maintenance,…

Conrad Ginther, P.E.

Conrad Ginther is a Principal Engineer based in Tennessee with more than 15 years of experience focused on delivering dam safety and seepage barrier projects that advance the state of…

Robert Glazier, P.G.

Robert Glazier is a Principal Environmental Consultant based in Maryland with more than 35 years of experience focused on site remediation, risk assessment, and environmental permitting associated with solid and…

Donald Goebel

Don Goebel is a Senior Principal based in Tennessee with more than 38 years of experience focused on sales, marketing, business development, and senior level executive sales management.

Cuneyt Gokmen, P.E.

Cuneyt Gokmen is a Senior Principal Geoenvironmental Engineer with more than 27 years of experience focused in the areas of civil, geotechnical, and environmental engineering.

Herwig Goldemund, Ph.D.

Herwig Goldemund is a Principal Scientist based in Georgia with more than 20 years of academic and professional experience as an environmental scientist and project manager.

Joe Goldstein, P.E.

Joe Goldstein is a Senior Engineer based in California with more than 10 years of experience in water resources, specifically in the area of flood risk management. He specializes in…

Janet Goodfellow, P.Eng.

Janet Goodfellow is a Principal Engineer based in Ontario with more than 20 years of professional experience focused on industrial water and wastewater challenges for a variety of sectors, including…

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…

Matt Gozdor

Matt Gozdor is a Senior Scientist based in Florida with more than 20 years of experience in groundwater flow and fate and transport modeling, quantitative hydrogeology, and hydrogeochemistry.

Gavin Grant, Ph.D., PEng

Gavin Grant is a Senior Principal based in Ontario with more than 15 years of experience focused on environmental remediation and the development and implementation of the Self-sustaining Treatment for…

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.

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,…

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.

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

Mark Grivetti, P.G., CHG, CEG, REA, is a Senior Principal Hydrogeologist based in California with more than 30 years of experience focused on characterization and remediation of hazardous waste sites,…

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…

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 30 years of experience developing environmental management solutions for properties impacted by a wide range of contaminants…

Cheryl Halim, Ph.D.

Cheryl Halim, Ph.D., is a Principal Environmental Engineer with more than 16 years of experience in environmental assessment and remediation, risk assessment and asbestos assessment and mitigation.

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.

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

Kathleen Harrison is a Principal Geologist based in California with more than 30 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 25 years of experience focused on water and wastewater treatment; pumping systems and pump stations; remediation of…

Anica Haynes

Anica Haynes is a Principal Environmental Permitting and Planning Practice Lead based in Louisiana with more than 20 years of experience focused on technical and project management, primarily in the…

Mark Heaney

Mark is a Senior Principal Consultant based in New York with more than 30 years of experience supporting clients in environmental, health, and safety (EHS) regulatory compliance as well as…

Tamara Hebeler, P.E.

Tamara Hebeler is a Principal Engineer based in Georgia with more than 20 years of experience focused on engineering design for several large geotechnical, remediation, and waste management projects including…

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, R.G.

Brian Hitchens is a Senior Principal Hydrogeologist with more than 20 years of experience focused on site assessment and remediation, contaminated sediment management, and litigation support.

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…
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