Founded in 1983, Questa Engineering Corporation is a civil, environmental, and water resources geological consulting firm that offers a range of services for industrial and commercial projects in California. The company provides services that include watershed management, geotechnical evaluation, and toxic and hazardous materials investigation and remediation. It offers services for public works, waste management, resource conservation, industrial and agricultural development, and water and wastewater treatment projects. Questa Engineering Corporation serves several federal, state and local government agencies, municipalities, districts and consulting firms. The company s clients include the Calaveras County Health Department, Glenn County Public Works Department, Environmental Science Association, Sea Ranch Association, Odd Fellow Recreation Club, San Juan Oaks Golf Club and Denise Duffy & Associates.