Gregg Drilling has more than 37 years experience with geotechnical and environmental site investigations. We are one of the largest site investigation providers in the Western U.S. offering a full suite of on-land and marine site investigation services including: drilling, cone penetration testing, sampling, remediation, and well services. In addition, our experienced personnel can maintain a high productivity rate saving time and money to the overall project.
Gregg is a diversified geotechnical and environmental drilling contractor. Originally founded in 1985, we currently have 150 employees and offices at the following locations: Signal Hill, CA (Corporate Office), Martinez, CA, and Palo Alto, CA.
Gregg’s clients include government agencies, industrial owners, engineering consulting firms and construction firms. Gregg is an Alaska Native-owned 8a-certified small business focused on quality and safety standards in site investigation.
Gregg has been widely recognized as a leader and innovator in subsurface investigation, providing clients in industry and government with excellent service, efficient performance, and a high standard of safety.
Gregg has set the standard among drilling companies through the pursuit of one simple goal: to provide clients with high-quality, innovative services performed in a safe, timely and cost-effective manner.