RGH Consultants was founded in 1991 as a full service firm with expertise in geotechnical engineering, engineering geology, and construction observation and testing. Headquartered in Santa Rosa, California, RGH has satellite offices in Napa and Middletown, California. 

Our staff of professional engineers and geologists, field engineers and engineering technicians collectively have decades of experience in geotechnical engineering, engineering geology, construction observation, and materials testing in northern California.

• Experience is the Difference •