Geosyntec San Diego Central Office

Each of our offices can assist clients with our complete range of proven and innovative engineering and scientific services from our global network of leading consultants. See a list of our practice areas »

Address: 2355 Northside Dr., Suite 250, San Diego, CA, 92108, USA

Telephone: 619-297-1530

Principal Consultants

  • 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 led dozens of multidisciplinary teams as they tackled a wide range of challenging and multi-faceted engineering projects, including post-fire erosion efforts and brownfield redevelopment opportunities.

  • Kathleen Harrison, P.G. QSP, QSD, QISP, ToR, REA

    Kathleen Harrison is a Principal Geologist based in California with more than 20 years of experience focused on watershed management, stormwater pollution prevention, and erosion control. She is a significant contributor to water resource projects across the United States.

  • Douglas Baumwirt, P.G., C.H.G.

    Doug Baumwirt is a Principal Hydrogeologist based in Southern California with more than 14 years of professional experience focused in the areas of environmental due diligence, site investigation and remediation, and groundwater management. He specializes in helping his clients manage their environmental liabilities, and takes great pride in developing and implementing strategies for regulatory compliance and case closure. 

Geosyntec Consultants
Geosyntec is a consulting and engineering firm that works with private and public sector clients to address new ventures and complex problems involving our environment, natural resources, and civil infrastructure.

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