Geosciences Principal

Gary Simpson, C.E.G.

Geosciences Principal

Gary is a Certified Engineering Geologist with 25+ years of experience, applying Quaternary Geology and geomorphology to geotechnical and geohazard evaluations. He has a wide range of experience in engineering geological analyses pertaining to slope stability, timber harvest impacts, forestland and rural road design and evaluations, and preparation of environmental impact reports. He has particularly strong experience in the identification and mitigation of earthquake-related hazards, and has conducted research-level studies of active faults throughout California, in the central U.S., and in Israel. He is also experienced in field mapping and site investigations for critical facility siting studies.

Certifications and Associations


Corporate Office:

812 W. Wabash Ave.
Eureka, CA 95501-2138
Tel: 707-441-8855
Fax: 707-441-8877

Office Locations:

  • Arcata, CA
  • Eureka, CA
  • Fort Bragg, CA
  • Redding, CA
  • Willits, CA
  • Coos Bay, OR
  • Klamath Falls, OR

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