About Gregg Drilling

Mr. Gregg is the founder and President of Gregg Drilling LLC. He has more than 35 years of professional experience in environmental and geotechnical contracting, consulting and project management.  He has a bachelor’s degree in Geological Engineering, he is a Registered Water Well Contractor and Registered Environmental Assessor in California. Mr. Gregg has been active in the areas of research and development in the industry and has grown the company throughout its 35+ years to over 160 employees throughout California.

Email John: jgregg@greggdrilling.com

Mr. Boyd is the Chief Operating Officer for Gregg Drilling, LLC. He oversees day to day management of Gregg’s drilling and testing services.  Mr. Boyd also serves as the Division Manager for Gregg’s Northern California operations.

Mr. Boyd has broad experience related to the management of geotechnical and environmental site investigations. He has extensive experience related to cone penetration testing (CPT) methods, both through his academic work at the University of British Columbia and during his work at Gregg. Mr. Boyd has managed numerous nearshore marine and in-land marine projects during his career. He has also managed large offshore deepwater geotechnical site investigation projects for global oil and gas related projects (predominately involving the use of seabed-based drilling equipment).

Email Tim: tboyd@greggdrilling.com

Brian is the Operations Manager for Gregg’s Southern California operations. He has over 20+ years experience operating and managing CPT equipment and personnel. He has been involved in thousands of land-based and marine near-shore site investigations and has extensive knowledge of the Southern California environment and local concerns.

Email Brian: bsavela@greggdrilling.com

Jake Wilson manages Gregg Drilling’s Northern California remediation division. His 12 years in the industry started at the San Francisco Regional Water Quality Control Board before moving on to environmental consulting where he worked as a field geologist and eventually a project manager.

Jake’s experience from consulting and being a regulator in the environmental industry keeps him mindful of overall project goals which leads to collaborative remediation programs that are effective and considerate of all stakeholders in a project. He enjoys overcoming the unique challenges in logistics, setup, and implementation that come with projects in the environmental industry.

Jake has a degree in Geology from San Francisco State University. His work experience prior to Gregg Drilling was focused towards subsurface investigation and remediation. He has worked in the field on projects throughout the western US including Alaska but was never able to convince someone to send him to Hawaii for work.

Email Jake: jwilson@greggdrilling.com

Kelly Cabal has worked for Gregg Drilling since 2003 in roles ranging from CPT Data quality review and control, to on-site data collection, to client education, and marketing and design. She has in depth knowledge of Gregg’s business operations and often serves as a technical resource for CPT questions and troubleshooting.

Kelly’s additional experience with marketing and design allow her to compile materials highlighting Gregg’s experience and quality services and communicate on the high technical level expected by clients and industry.

Kelly has a degree in Engineering Physics from the University of Alberta and has completed courses in marketing and multimedia design.

Email Kelly: kcabal@greggdrilling.com

Dr. Peter K. Robertson brings more than 50 years of experience as an educator, researcher, consultant and practitioner specializing in the areas of in-situ testing and site investigation, earthquake design of geotechnical structures, and soil liquefaction. Peter is recognized as an expert both nationally and internationally in the areas of in-situ testing and soil liquefaction. He has been a consultant to various clients around the world for projects involving liquefaction evaluation for major structures, stability of on-shore and off-shore structures, landslides, stability of natural slopes and tailings dams, and use and interpretation of in-situ tests. He is the co-author of the primary reference book on Cone Penetration Testing (CPT). He has also authored or co-authored over 250 publications as well a popular CPT Guide that is freely available on several websites. Peter has also assisted in the development of several inexpensive CPT-based interpretation software programs and has presented a series of free webinars to enhance education and practice.

Peter continues to provide private consulting to a wide range of clients and currently resides in Southern California.

Email Peter: probertson@greggdrilling.com

Joanna is a Project Manager for Gregg Drilling in Southern California. She had been with Gregg for over 25 years and currently prepares proposals and scheduling for auger, direct push, development and CPT operations.

Email Joanna: jmckeehan@greggdrilling.com

Mr. Evans serves as project manager for Gregg primarily on large complex projects involving rotary and auger drilling. Mr. Evans’ duties include project bidding, procurement, supervision of drill crews and support personnel and project scheduling. He is experienced with mud rotary, air rotary, hollow stem auger, dual wall percussion hammer and rotary, wire line coring, well installation, well development and rehabilitation and installation of geotechnical instrumentation.

Email Gabe: gevans@greggdrilling.com

Alex oversees Gregg’s Remediation Services Division to ensure we are safely delivering result-oriented remediation services and utilizing best practices. As a project manager, Alex offers years of experience on In Situ Remediation projects across the U.S., as well as complex direct push projects.

Email Alex: ajernigan@greggdrilling.com

Brandon Moses is Gregg’s Project Manager for Direct Push Services in Northern California. Brandon has 17 years experience with Gregg Drilling as a both a drilling helper and operator. Brandon’s experience ranges from operating direct push rigs, to hollow=stem auger drilling and environmental remediation equipment.

Email Brandon: bmoses@greggdrilling.com

Ryan Lea’s responsibilities include creating quotes and management for Gregg Drilling NorCal’s hollow stem auger, sonic, development and air-vac truck services. Ryan has over a decades experience in hollow stem auger drilling and management. He also has experience in environmental drilling as well as geotechnical projects.

Email Ryan: rlea@greggdrilling.com

Mrs. Porter has a background in geology and experience as a Staff Geologist in consulting before coming to Gregg Drilling.  Her project experience includes geotechnical, environmental, and construction projects for commercial, industrial, and public works developments.

Email Megan: mporter@greggdrilling.com