Our profile

Forrest A. Garb & Associates (FGA) provides engineering and geology consulting services to the upstream oil and gas industry. Our Dallas, Texas office is staffed by a team of experienced highly trained engineers and geologists. Our clients rely on our analysis and reports for activities that include Securities and Exchange Commission Reporting, Capital Market Financing, and Acquisitions and Divestitures. Our reputation for attention to detail, integrity, and ethics is recognized by our clients in the oil and gas and related industries.

FGA professionals have extensive experience in the important hydrocarbon producing areas, including North and South America, the Middle East, China, Southeast Asia, Australia, New Zealand, Europe, and North Africa.

We provide value based independent third-party engineering and geologic services.

FGA does not participate in the working or overriding ownership of any oil and gas properties. This practice guarantees that there is no possibility of a conflict of interest with any assignment. FGA is dedicated to providing the highest level of integrity and response to our customers.

Our standards are the code of ethics the industry expects from us over decades of service. Please contact us for a complete list of services or to discuss your project.


Our Vision

We tailor project scope to fit project needs and we gladly provide our clients with keys to achieve their goals.

Our Mission

FGA strives to provide value to our clients through technical expertise, successful completion of projects on time, and competitive pricing.


Our History

Forrest A. Garb & Associates

Forrest A. Garb & Associates was founded in 1988. Forrest A. Garb, the founder, accomplished more than 40 years of practical petroleum industry experience. Mr. Garb was a staff member and then a principal of a major consulting firm for 32 years. He served as president and chief operating officer of that firm for the last 14 years of his tenure. He supervised or was associated with over 12,500 project assignments. Using this experience as a base, he founded FGA. He assembled best in class processes and technologies to complement an experienced staff ensuring value and economy to the client.

Mr. William D. (Donnie) Harris III joined the staff as President in August 1998, and became Chief Executive Officer of Forrest A Garb & Associates in January 2002. Previously, he was on staff at a major consulting firm where he prepared and supervised engineering and reserve studies, and appraisal reports for fields in many countries. Donnie served as President and CEO of Forrest A Garb & Associates until his passing in December 2020.

Tad M. Fielder joined Forrest A. Garb & Associates in 2021. He has over 20 years experience in engineering consulting, evaluation of oil and gas assets, field operations, and drilling. Tad is serving as President of Forrest A. Garb & Associates to continue the FGA legacy of dedication to our profession, technical excellence, and highly ethical character.

Professional organizations

Respected Professionals

Dedicated to technical excellence and highly ethical character


Add value to our clients and complete project goals


We provide a coherent plan for every client


Tailored project scope to meet your needs

Competitive Prices

Affordable services for a wide range of projects and companies

Available for Support

Attentive to clients; focus on delivering and meeting deadlines