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Ruth Custance

Ruth Custance is a Senior Principal Environmental Scientist based in California with more than 20 years of experience focused on the development and effective communication of risk-based approaches for site…

Michael D'Alessandro, PE

Michael D'Alessandro is a Senior Principal Environmental and Civil Engineer based in Georgia with more than 25 years of experience focused on the development of environmental and infrastructure projects using…

Victor Damasceno, PhD, PE

Victor Damasceno is a Senior Principal Engineer based in North Carolina with more than 12 years of professional experience focused on geotechnical and geoenvironmental engineering related to solid waste containment…

Jeff Daniel, PEng, PE

Jeff Daniel is a Senior Principal Engineer based in Ontario with more than 28 years of experience focused on helping clients in Canada and the United States develop and implement…

Rebecca Daprato, PhD, PE

Rebecca Daprato is a Senior Principal Environmental Engineer based in Colorado with more than 14 years of professional experience focused on groundwater and soil site assessments, remedial system technology evaluations,…

Helen Dawson, PhD

Helen Dawson is a Senior Principal Civil and Environmental Consultant based in Washington, DC, with more than 30 years of experience focused on private practice, academia, and public service.

Rula Deeb, PhD, BCEEM, PMP

Rula Deeb is a Senior Principal based in California with more than 25 years of experience focused on private practice and academia addressing the cross-media fate and transport of contaminants…

Mary deFlaun, PhD, BCES

Mary deFlaun is a Senior Principal environmental microbiologist based in New Jersey with more than 30 years of experience remediating recalcitrant organics and metals, including monitored natural attenuation (MNA), enhanced…

Jim Deitsch, PhD, PE

Jim Deitsch is a Senior Principal Engineer based in Georgia with more than 25 years of experience focused on site remediation, remediation system design, water and wastewater treatment system design,…

Scott Deitche

Scott Deitche is a Senior Principal Water Resources Expert with more than 28 years of experience assessing water quality, supporting water quality regulatory compliance, and managing water resource planning, stormwater…

Todd DeJournett, PhD, PE

Todd DeJournett is a Principal Engineer based in Minnesota with more than 20 years of experience focused on industrial water/wastewater treatment, drinking-water treatment, aquatic chemistry, and remedial system design.

Jamie deLemos, PhD

Jamie deLemos is a Senior Principal based in Massachusetts with more than 15 years of experience focused on soil and aqueous geochemistry and contaminant forensics.

John deLaChapelle, LG, LEG

John deLaChapelle is a Senior Principal Engineering Geologist based in Washington with more than 23 years of professional experience focused on assessing and managing geohazards for oil and gas clients,…

Peter de Haven, PE

Peter de Haven is a Senior Principal Engineer based in North Carolina with more than 25 years of experience focused on site characterization, data management and analysis, regulatory negotiation, and…

Damon DeYoung, PG, PMP

Damon DeYoung is a Principal Geologist based in California with more than 20 years of experience focused on geologic and hydrogeologic investigations, program development and management, and environmental restoration of…

Lucas de Melo, PhD, PE

Lucas de Melo is a Senior Principal Engineer based in Maryland with more than 25 years of experience focused on dams and mining related projects, geotechnical design and field studies,…

Len de Vlaming, PEng

Len de Vlaming is a Principal Engineer based in Ontario with more than 20 years of experience in chemical process design, water treatment design and capital project delivery.

Jon Dickinson, PE

Jon Dickinson is the company's Chief Financial Officer and Senior Vice President for Corporate Services. As CFO, Jon serves as a member of Geosyntec's Executive Committee responsible for strategic guidance,…

Paul Dockweiler, CPG, CEM

Paul Dockweiler is a Senior Mining Geologist based in Nevada with more than19 years of experience focused on the development and start-up of hardrock mining operations.

Peter Dollar

Peter Dollar is a Senior Consultant based in Ontario with more than 30 years of experience focused on site characterization, remediation strategy, remedial design and implementation, and risk management. He…

Lane Dorman, PG

Lane Dorman is a Principal Hydrogeologist based in Florida with more than 12 years of professional experience focused on the assessment and remediation of arsenic, coal combustion residuals (CCR), and…

Jamey Dotson, PE

Jamey Dotson is a Senior Principal Engineer based in Tennessee with more than 17 years of professional experience focused in the areas of civil, environmental, and geotechnical engineering; program management;…

Scott Drew, LSRP

Scott Drew is a Senior Principal Environmental Scientist based in New Jersey with more than 40 years of experience focused on the fields of environmental technology, site remediation, and environmental…

Ryan Duckett, PE

Ryan Duckett is a Senior Engineer based in Virginia who focuses on solid waste advisory services and integrated solid waste management with an emphasis on organics and diversion.

Kevin Dufresne, PEng

Kevin Dufresne is a Senior Engineer based in Ontario with more than 20 years of experience in process engineering and the water industry. 

Rich Dulcey, PE

Rich Dulcey is a Senior Principal Engineer based in Pennsylvania with more than 30 years of experience focused on remedial strategy, investigation, engineering and implementation at complex sites, including EPA…

Michael Dupuis PE, PEng

Michael Dupuis is a Senior Engineer based in California with more than 10 years of experience focused on the seismic analysis and structural design of large concrete dams and buildings.…

Neal Durant, PhD

Neal Durant is a Senior Principal Consultant based in Washington, D.C. with more than 30 years of experience investigating, remediating, and managing complex contaminated sites.

Amy Dzialowski

Amy Dzialowski is a Senior Principal with more than 20 years of experience focused on environmental planning, stakeholder engagement, public-private partnership development, compliance, and program funding experience.

Carl Elder, PhD, PE

Carl Elder is a Senior Principal Remediation Engineer based in Massachusetts with more than 25 years of experience focused on the selection, design, and implementation of soil and groundwater remediation…

Dylan Eberle, PhD

Dylan Eberle is a Scientist based in Massachusetts with more than 5 years of experience focused on site characterization, emerging contaminants, litigation support, and innovative remediation technologies.

Ali Ebrahimi, PhD, PE

Ali Ebrahimi is a Senior Principal Geotechnical Engineer based in Texas with more than 15 years of experience focused on the geotechnical engineering and design, geological hazard assessment and mitigation,…

Scott Elder

Scott Elder is a Senior Principal and Construction Specialist based in Georgia with more than 30 years of experience focused on the management and implementation of complex field assignments, delivery…

Mark Ellard, PE, CFM, D.WRE, ENV SP

Mark Ellard is a Senior Principal Water Resources and Environmental Engineer based in Florida with more than 30 years of experience in diverse watershed management, water quality assessment, and stormwater…

Daniel Elliott, PhD

Dan Elliott is a Senior Consultant based in New Jersey with more than 25 years of experience managing environmental due diligence assessments, characterizing and quantifying environmental liabilities, managing remediation portfolios,…

Rica Enriquez, PhD, PE

Rica Enriquez is a Senior Environmental Engineer based in Minnesota with more than 15 years of experience focused on applying computational modeling and data science within environmental consulting and forensics.…