About Us

Collier Consulting is a woman-owned geoscience and engineering firm with offices across Texas, as well as Colorado, Georgia, North Carolina, Oklahoma, Tennessee, Massachusetts, and Wisconsin.

Founded in 1998, our mission is to provide our clients with the best solutions. We work hard to meet our clients’ needs – with honesty, attention to detail, and a strong work ethic. This philosophy has allowed us to grow, but more importantly to develop and sustain long-term relationships with you – our clients.

President’s Welcome

Gail Collier, President
Gail Collier, President

Collier is devoted to Clients, Staff, and Safety. Moral principles are the foundation on which our company is built. Honesty, Integrity, and Selflessness are just a few of the qualities that constitute this foundation.

Providing our clients with quality geoscience and engineering solutions is what we have been proud to do for nearly 20 years. I believe our success is a direct result of continually doing what is morally and ethically right. We strive to always deliver the best solutions for our clients. I am proud to say that the Collier name is one that can be trusted into the next generation.

Investing in our employees is equally as important as our commitment to our clients. We are committed to cross-training, mentorship, and leadership development of our staff. We have an amazing and dedicated staff that exemplifies professionalism.

Health and safety is essential in every aspect of our professional efforts for the sake of our clients and employees. We all have an equal responsibility to ensure that our individual actions are always conducted in a safe manner.

We must respect our environment and be proper stewards of the resources we have been blessed with. Collier knows that decisions made today will have lasting implications for the environment.

We look forward to working with you to meet your geoscience and engineering needs.

Key Personnel

Gail Collier


Hughbert Collier
Ph.D., P.G.

Sr. Vice President

Aaron Collier

Vice President

Jorgen Bergstrom

Principal Geophysicist / Operations Manager

Brad Cross

Principal Hydrogeologist

William Doll
Ph.D., P.G.

Sr. Geophysicist/Federal Market

Brandon Gartrell

Sr. GIS/Software Manager

Peter George
Ph.D., P.G.

Sr. Hydrogeologist

John Jansen
Ph.D., P.Gp., P.G.

Principal Geophysicist/ Hydrogeologist

Doug Laymon

Principal Geophysicist / Operations Lead

Hunter King


Alyson McDonald
Ph.D., P.G.

Sr. Geoscientist

Nicole Pendrigh

Sr. Geophysicist / Operations Manager

Ted Powell

Sr. Hydrogeologist/ Geophysicist

Peter Schulmeyer

Sr. Hydrogeologist

Phil Sirles

Principal Geophysicist / Business Development Lead

Matt Van Hattem

Sr. Engineer

Kenny Weldon

Senior Director of Government Programs