President

Mr. Boyd is the President 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

Health and Safety Manager

Mike is the company wide HSE Manager. He has extensive experience in Health & Safety management and project coordination with Gregg Drilling for both on-land and over-water operations. He is also experienced in environmental site investigation techniques and remediation.

Email Mike: mhaske@greggdrilling.com

Southern California Operations Manager

Mr. Velazquez has been employed with Gregg Drilling for 13 years. He is currently serving as the Operations Manager for Gregg Drilling’s Southern California headquarters.  Mr. Velazquez is responsible for the supervision of drill crews and yard personnel.  Mr. Velazquez has in-depth knowledge of drilling equipment and project requisites to ensure project completion. He collaborates with Project Managers, Safety Compliance Managers and Drillers to coordinate personnel and project needs.

Email Frank: fvelazquez@greggdrilling.com

Southern California Project Manager - Hollow-Stem Auger & Direct-Push

Mr. Contreras serves as Project Manager for Gregg Drilling’s Southern California hollow stem auger and direct push drilling projects.  Mr. Contreras’s duties include project bidding, procurement, supervision of drill crews and support personnel, and project scheduling.  Working with Gregg Drilling for 32 years, Mr. Contreras has in-depth knowledge of Gregg’s equipment and the requirements for a successful project. His experience of working in the field as a crew member and as a driller provides valuable perspective. In addition, he has 23 years of experience as a project manager and has managed a large variety of environmental and geotechnical drilling projects. 

Email Joe: jcontreras@greggdrilling.com

Northern California Operations Manager

Mr. Moses has been employed with Gregg Drilling for 13 years. He is currently serving as the Operations Manager for Gregg Drilling’s Northern California headquarters.  Mr. Moses is responsible for the supervision of drill crews and yard personnel as well as a Project Manager for Gregg’s direct-push and well installation department.

Email David: dmoses@greggdrilling.com

Northern California Project Manager - Sonic & Hollow-Stem Auger

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

Diamond Coring Project Manager

Mr. Murphy has a wealth of experience with difficult access and diamond coring and we are excited to have his as part of the Gregg team! Lyle is based in Washington and assists with projects across the US.

Email Lyle: lmurphy@greggdrilling.com

Southern California Project Coordinator

Kathleen Hulguin serves as a Project Coordinator at Gregg Drilling’s Southern California office. Ms. Hulguin brings her experience as an Army veteran and Geology background from UC Berkeley to assist Project Managers across our multiple disciplines and offices. Kathleen’s responsibilities include organizing and managing the bidding process, solving complex problems, and coordinating operations efforts.

CPT Project Manager

Alex Sancen (aka Lil Guy) runs CPT operations at Gregg Drilling with 17+ years of boots-on-the-ground CPT experience.  An Army veteran and straight-up operator, he brings a no-fluff, high-accountability approach to leading crews and delivering solid results. If it’s got to get done right, he’s on it.

Email Alex: aasancen@greggdrilling.com

Sourthern California Project Manager - Rotary Division

Eric Smith serves as the Project Manager for the Rotary Division of Gregg Drilling’s Southern California office. Mr. Smith brings twelve years of experience in the environmental and geotechnical consulting industry and a licensed Professional Geologist background to understand our client’s project needs and meeting technically challenging requirements in both small- scale and large-scale projects.

Email Eric: esmith@greggdrilling.com

Southern California Regional Manager

Colm Hurley brings over 25 years of experience in the geotechnical and drilling sectors. After relocating from Ireland to California in 2024, he serves as our Regional Manager in Southern California. Throughout his career, he has held key roles with leading geoscience companies across Ireland and the UK, developing deep expertise in managing complex and technically demanding projects. Colm has overseen national operations and regional offices for several firms, and prior to his move to California, he served as Regional Manager for our sister company, Causeway Geotech Ltd.
Known for his collaborative approach, Colm builds strong relationships with clients and site teams, ensuring seamless project delivery from planning through execution. His hands-on leadership style and ability to foster trust make him an invaluable asset on complex field programs.

Email Colm: churley@greggdrilling.com

Senior Project Manager Geotechnical Services

Ian Wood oversees our geotechnical programs and projects throughout Northern and Southern California. He also leads our advanced geotechnical testing services, including vane shear testing, hammer energy calibrations, and pressure meter testing. A graduate of UC Berkeley, Ian has quickly distinguished himself since joining Gregg in 2022, bringing strong technical expertise and proven leadership to every project.

Email Ian: iwood@greggdrilling.com

Northern California Project Manager - Rotary Drilling

Mr. Chaves has over 30-years experience in the drilling arena as a project manager and lead driller working on geotechnical and construction projects. He brings a wealth of knowledge to Gregg Drilling as our Northern California rotary project manager and supports projects for geotechnical drilling and instrumentation, water resources, environmental drilling/sampling/monitoring wells and deeper rotary projects.

Email John: jchaves@greggdrilling.com

CPT Data QAQC & NorCal CPT Project Coordinator

Eleni currently compiles Gregg’s CPT data and other specialized testing data into final reports for clients, responding to questions and requests on a day to day basis. In addition, she creates proposals for CPT services in Northern California. Her excellent skills with data management, Microsoft excel and mathematics has enabled her to efficiently work across various software packages with ease while creating visually inspiring presentations.

Email Eleni: epateras@greggdrilling.com