Our team—geotechnical engineer Art Graff, professional geologist Greg Sarganis, certified engineering geologist Steve Klick, and civil engineer Jessie Polino—brings over 100 years of combined experience in geotechnical and geologic services across Sonoma, Napa, Marin, Lake, and Mendocino counties. Since 1988, we’ve conducted geotechnical investigations, supervised construction, and prepared geologic hazard reports, including fault, landslide, and coastal bluff studies, for a wide range of commercial, municipal, and residential projects on both hillside and flatland sites.

Our senior field engineers, with 50+ years of combined experience, specialize in residential, commercial, and industrial projects. Fully certified and equipped, they perform field density tests, foundation inspections, concrete testing, and special inspections for reinforcing steel, epoxy, nailing, and more.