Lisa A. Hall, PE
Lisa Hall is a Principal Engineer based in California with more than 30 years of experience focused on navigating through all phases of the life cycle of environmental projects.
Meredith Hayes
Meredith Hayes is a Principal Scientist with more than 20 years of experience focused on leading environmental investigation and remediation for large and technically challenging projects involving contaminated sediments and waterfronts.
Gary Hurta, PE
Gary Hurta is a Principal Engineer based in New York with more than 30 years of experience focused on remedial action selection and design, brownfield redevelopment planning and design, environmental permitting, and solid and hazardous waste facilities.
Andrew Holmson, PE
Andrew Holmson is a Principal Geotechnical Engineer based in Oregon with more than 18 years of experience focused public and private infrastructure projects, including transportation and utility improvements, landslide stabilizations, habitat restoration, dams and levees, seismic resiliency and retrofits, water supply and storage, and redevelopment work.
Joey Hickey, CHMM
Joey Hickey is a Principal Environmental Scientist based in Oregon with more than 27 years of experience focusing on conducting multimedia investigations, providing stormwater-related services, and managing hazardous waste.
Gary M. Hacker, LEED-AP
Gary Hacker is a Senior Consultant based in Washington, DC, with more than 30 years of experience focused on business transactional services and environmental compliance matters.
Derek Holom, LHG, RG, PG
Derek Holom is a Senior Hydrogeologist based in Idaho with more than 18 years of experience focused on groundwater supply, mine water, and solid-waste landfills.
Ruairi Hanly, CEnvP
Ruairi Hanly is a Senior Principal Consultant based in Australia with more than 23 years of experience in the environmental industry.
Rebeka Hall, CEnvP
Rebeka Hall is a Senior Principal Environmental Scientist based in Australia with more than 28 years of experience in contaminated site assessment and remediation. She is a New South Wales Environment Protection Authority (EPA) accredited Site Auditor, a Certified Environmental Practitioner—Site Contamination, and an Exemplar Global Certified Lead Auditor.
Michael Hansen, CHMM, BCES, CSP
Michael Hansen is a Principal Environmental Scientist based in Maryland with more than 19 years of experience focused on performing environmental site characterization, remedial action construction, and environmental compliance.
