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David Parkinson, Ph.D., P.G.

Dave Parkinson is a Principal Scientist based in Washington with more than 20 years of environmental consulting experience focused on a wide variety of groundwater, surface water, water resources, environmental…

Tom Peel, Ph.D.

Tom Peel is a Senior Principal based in Florida with more than 20 years of experience focused on environmental science and engineering including the development of regulatory and risk-based strategies…

James Peale, RG, LHG

James Peale is a Principal Hydrogeologist based in Portland, Oregon with more than 25 years of experience focused on legacy site management, contaminant fate and transport, and environmental forensics.

Steve Peene, Ph.D.

Steve Peene is a Senior Principal based in Florida with more than 32 years of experience focused on the water resources practice.

Juan Pestana, Sc.D., P.E.

Juan Pestana is a Senior Principal Geotechnical Engineer with more than 30 years of experience focused on geotechnical and geotechnical earthquake engineering.

Chriso Petropoulou, Ph.D., P.E., BCEE

Chriso Petropoulou is a Senior Principal Environmental Engineer based in Illinois with more than 29 years of consulting experience focused on a wide variety of clients in the industrial manufacturing…

Brian Petty, P.E.

Brian Petty is a Senior Principal based in California with more than 17 years of experience focused on chemical and civil engineering, industrial water management, water and wastewater treatment plant…

Sam Phlegar, P.E.

Sam Phlegar is a Senior Principal Engineer based in South Carolina with more than 36 years of experience focused on Coastal Engineering, Marina Planning and Design, Environmental Planning and Resort…

Najwa Pitois, Ph.D., P.E.

Najwa Pitois is a Senior Engineer based in California with more than 15 years of experience focused on integrated water resource management.

Steven Poirier, Ph.D., P.E.

Steve Poirier is a Principal Engineer based in Massachusetts with more than 15 years of experience focused on offshore wind, contaminated site assessment and remediation, design and construction of geoenvironmental…

Aaron Poresky, P.E.

Aaron Poresky is a Principal Water Resources Engineer based Oregon with more than 15 years of experience focused on urban stormwater and watershed management.

Al Preston, Ph.D., P.E.

Al Preston, Ph.D., P.E., is a Principal Engineer based in California with more than 16 years of experience leading and managing complex water resources projects involving hydraulics, hydrodynamics, and hydrology.…

Dale Prokopchak, CIH, CSP

Dale Prokopchak is a Principal Industrial Hygienist and Occupational Safety Specialist with more than 38 years of experience as a leader in industrial hygiene, safety, corporate environmental, health and safety…

Deran Pursoo, P.E.

Deran is Senior Engineer based in Phoenix, Arizona with 14 years of experience focused on engineering design, procurement, construction management and O&M management services. Primary experience has been for Superfund…