We’re honored to provide drilling services to many highly respected companies. Read what clients are saying about working with the Gregory Drilling team.

Exceptional Equipment and Staff

“I have worked with Gregory Drilling for over six years. Their equipment and staff are exceptional. I have worked with them in difficult soils and locations, and each time they have provided excellent service with the ability to always complete the job while doing great work.”


Todd Valentine, PE
Geotechnical Engineer
CH2M Hill
Bellevue, WA

Selects Gregory Drilling for Key Projects

“Hart Crowser has worked with Gregory Drilling Inc. on most of our key projects the past four years from small to very large jobs. We have been extremely successful using Gregory Drilling on many difficult, deep, complex drilling projects. We enjoy working with them and they are easy to work with. Gregory Drilling is in the process of successfully completing our largest most visible drilling project to date at the SR 99 Tunnel Instrumentation Project. We look forward to working with them on the next large project.”


Scott Wright
Field Coordinator
Hart Crowser, Inc.
Seattle, WA

Top Notch Safety and Quality

“It was a real pleasure getting to work with you and your crew. Gregory Drilling is a top notch contractor in both safety and quality! We appreciate the level of professionalism that was demonstrated to the customer on a daily basis. Looking forward to working with Gregory Drilling again on the next project! Thanks.”


Matthew Clark
Estimator II Turn Key Specialist
Trane Commercial Systems
Redmond, WA

Cooperation of the Drilling Crew Was Exceptional

“During April and May of 2019, Gregory Drilling, Inc was engaged in a drilling, hydraulic fracturing and injection program in South San Francisco, California. Insight EECI was the onsite client’s representative throughout the drilling program.


“Having been personally involved with similar drilling projects throughout the continental United States, I can attest that this was a particularly challenging project which required drilling accurate holes into fractured and solid bedrock for subsequent hydraulic fracturing, injections and tiltmetering. Although the ground was highly fractured in places, Gregory was able to achieve consistently high core recoveries. Coordination with our fracing and injection crew was of primary importance and the cooperation of [the drilling] crew was exceptional. The project was completed on time, within budget, and to the satisfaction of all parties. I especially appreciated the efforts of [Gregory Drilling’s project manager], whose all-around capabilities, innovativeness and cooperation ensured the job went smoothly.


“I would highly recommend Gregory Drilling to any client requiring professional drilling services, especially where considerable difficulties may be encountered.”


Dave Marks, PG, Senior Manager
Insight Environmental Engineering & Construction, Inc.
Sacramento, CA

Under Any Circumstances, Gets the Job Done Right

“We depend on accurate, timely information in order to negotiate what are often complex environmental issues. Gregory Drilling enables us to collect the data we need in a timely manner. Their drilling teams are professional, adhere to each job’s unique site requirements, and get the job done right regardless of the challenges. We are consistently pleased with their results and how easy they are to work with. I highly recommend Gregory Drilling.”


Sean W. Donnan, P.G., Principal
Environmental Service Line Director, Western Operating Group
Mountlake Terrace, WA

The Right Experience, Equipment, and Results

“I’ve used Gregory Drilling to drill over 50 cathodic protection wells over the years. Their experience, well maintained equipment and professionalism has consistently given me the end product I wanted. I would recommend them to anyone.”


Anthony Mitchell
Senior Cathodic Protection Specialist
Tesoro Corporation
Houston, TX

Always On Time and Ready to Go

“Gregory Drilling has always showed up on time, ready to go and represented my company in a safe and professional manner. I would recommend them for any commercial or residential well project you may have.”


Logan Swanson
Kent, WA


Contact us to talk with a drilling professional about your drilling project. Our crews will work hard to make your job easier. You can count on experience crews with a professional attitude and well-maintained equipment to get your job done right and on schedule.