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Krzysztof S. Jesionek, P.E.

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,…

Hong Jin, Ph.D.

Dr. Hong Jin is a Senior Professional based in Texas with more than 13 years of oil and gas industry experience, working for firms such as ConocoPhillips, Phillips 66, and…

Mark Johnson

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, P.E., G.E.

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…