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Geosyntec has built a record of successful client service by attracting some of the most creative scientists and engineers from the graduate programs of leading universities around the world.

We retain staff by providing challenging projects and a management and professional development infrastructure to support innovation on behalf of clients. We also provide staff with ownership opportunities and other financial incentives that create continuous personal links between client service and corporate well-being.

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Alphabetical List of Senior Practitioners

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,…
Venkat Gummadi is a Principal Water Resources Engineer based in California with more than 10 years of professional experience focused on urban stormwater management. He specializes in stormwater best management…
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 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 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 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 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 is a Principal Civil Engineer based in Pennsylvania with more than 20 years of experience focused on project management and engineering experience for client projects, including remediation of…
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 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 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 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 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,…
Susan Hill, P.E., a Senior Principal at Geosyntec, is an Environmental Engineer with more than 30 years of experience focused on the investigation and remediation of sediment mega sites. She…
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 is a 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 compounds…
David Hoffman is a Senior Principal Engineer based in Texas with more than 33 years of professional experience focused on port facility planning and design, site development permitting, risk-based closure…
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 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…
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 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. 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 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 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…
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 is a Principal Hydrogeologist based in Florida with more than 20 years of experience focused on a wide range of environmental projects, including groundwater monitoring and reporting, contamination…
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 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 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…
Todd Kafka is a Principal Hydrogeologist based in Florida with more than 23 years of professional experience focused on site assessment, remediation, and hydrogeological investigations for industrial, state, and federal…
Mike Kavanaugh is a Senior Principal Environmental Engineer based in California with more than 35 years of consulting experience focused on the areas of water quality, water treatment, and groundwater…
Seth Kellogg is a Senior Geologist based in New Jersey with 25 years of experience in the areas of project management, project planning, remedial investigation, feasibility study, remedial design, data…
Jason Kerstiens is a Principal Civil and Environmental Engineer with over 19 years of experience providing process engineering, regulatory compliance, water resource optimization, and strategic planning services to industrial, municipal,…
Geosyntec Consultants
Geosyntec is a consulting and engineering firm that works with private and public sector clients to address new ventures and complex problems involving our environment, natural resources, and civil infrastructure.

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