Cawley, Gillespie and Associates, Inc.

60+ years of serving the oil and gas industry.

As a petroleum consulting firm, CG&A reviews and evaluates hundreds of thousands of oil and gas properties on an annual basis worth billions of dollars. Our clients include oil and gas companies, financial institutions, midstream/pipeline companies and individual investors. With diversified experience in oil and gas producing properties throughout North America and around the globe, CG&A’s proficient team of reservoir engineers and geologists integrate geological, geophysical, engineering and economic data to produce high-quality reserve estimates and economic forecasts.

  • Putting our clients first, since 1961
  • Office locations in Fort Worth, Houston, and Austin, Texas, USA
  • 30+ Engineers, Geologists and Technical Analysts
  • Worldwide producing basin experience, unconventional and conventional
  • Approved by all major banks, key regional banks, and private equity firms
  • Deep experience with SEC, SPE-PRMS and COGEH guidelines and reporting
Our Services

Partners

President

Todd Brooker

Todd is President at CG&A and has been with the firm since 1992. As a Reservoir Engineer, his responsibilities include reserves and economics evaluations, fair market valuations, field studies, pipeline resource studies, and acquisition/divestiture analysis. His reserve reports are routinely used for public company SEC disclosures. His experience includes significant projects in both conventional and unconventional resources in every major U.S. producing basin and abroad. He is based in Austin and has managed that office since its opening in 2002. Prior to joining CG&A, Todd worked in the Gulf of Mexico drilling and production engineering at Chevron USA in New Orleans, Louisiana. He graduated Magna Cum Laude from the University of Texas at Austin in 1989 with a BS degree in Petroleum Engineering. He is a registered professional engineer in Texas, a member of the Society of Petroleum Engineers (SPE) and the Society of Petroleum Evaluation Engineers (SPEE).
Executive Vice President

Zane Meekins

Zane is Executive Vice President at CG&A and has been with the firm since 1989. His primary responsibilities include reserves & economics evaluations, and field studies. He has extensive experience in the evaluation of both conventional and unconventional gas and oil reservoirs in the United States and abroad. Zane is actively involved in reserves and economics analyses for use in property acquisitions by various clients. He graduated Summa Cum Laude from Texas A&M University in 1987 with a BS in Petroleum Engineering. He is a registered professional engineer in Texas, a member of the Society of Petroleum Engineers (SPE), and The Society of Petroleum Evaluation Engineers (SPEE).
Chief Technical Officer

Tom Hardman

Tom came to CG&A in 1973 as Data Processing Manager. He received a BS degree in Mathematics in 1973 from the University of Texas at Arlington. He provides data acquisition and management services, development and organization of engineering databases, and analysis of client assets for reserve filings with financial and regulatory organizations. Tom is highly experienced in reserve and economic models, both from the software development perspective and as an end-user. He also serves as an engineering computing facilitator for numerous and varied reserve and economic projects, working effectively with clients, engineers and technical staff.
Chief Financial Officer

Mary Ann Giordano

Mary Ann is the Chief Financial Officer and Treasurer of CG&A, joining the firm in May, 1988. She is also a member of the Board of Directors and Executive Committee of CG&A. She previously worked with Exxon and The Superior Oil Company in Houston. Her past experience includes audits of gasoline processing plants and the oil and gas revenue stream from field operations, through ultimate disposition for verification of settlement to working interest and royalty interest owners. Mary Ann is a graduate of Southern Methodist University with a BBA degree in Accounting. She is a CPA and a member of the Texas Society of Certified Public Accountants.
Vice President

Gus Presas

Gus joined CG&A in September of 1997 as a reservoir engineer. His responsibilities include reserve and economic evaluations, fair market valuations, field studies and acquisition/divestiture analysis. His experience includes the evaluation of conventional and unconventional resources in every major basin in the United States. Gus graduated from the University of Houston with a B.S. in Chemical Engineering and a Master’s degree in Petroleum Engineering. He is a member of the Society of Petroleum Engineers (SPE).
Vice President

Matt Regan

Matt joined CG&A in January of 2005 as a reservoir engineer. His responsibilities include reserve and economic evaluations, fair market valuations, field studies and acquisition/divestiture analysis. His experience includes the evaluation of conventional and unconventional resources throughout the continental United States and the Gulf of Mexico. Matt graduated from the University of Texas at Austin with a B.S. in Chemical Engineering. He is a registered professional engineer in Texas.
Senior Engineer

Kellie Jordan

Kellie joined the CG&A team in October of 2004 as a reservoir engineer. Her responsibilities include reserve and economic evaluations, fair market valuations, field studies and acquisition/divestiture analysis. Her experience includes the evaluation of properties throughout the United States. Kellie graduated from the University of Texas with a B.S. in Petroleum Engineering. She is a member of the Society of Petroleum Engineers (SPE).
Senior Engineer

Jonathan Schmit

Jonathan, a Senior Reservoir Engineer, joined the firm in 2011. His primary responsibilities include oil/gas reserves and economic estimations, per SEC and SPE-PRMS guidelines, for public and private reserves reporting, acquisition/divestiture analysis, midstream volumetric assessments, and enhanced oil/gas recovery feasibility studies. He has managed conventional/unconventional resource projects in all major onshore basins in the continental U.S. and the Gulf of Mexico. Jonathan graduated Cum Laude from Virginia Polytechnic Institute and State University (Virginia Tech) with a B.S. in Chemical Engineering and is a registered professional engineer in the state of Texas.
Senior Engineer

Josh Passman

Josh joined CG&A in October 2011 as a Senior Reservoir Engineer. His responsibilities include reserves and economics evaluations, field studies, pipeline resource studies, and acquisition/divestiture analysis. His reserve reports are routinely used for public company SEC disclosures. His experience encompasses 10 years working for operators in all facets of upstream petroleum engineering including management before joining CG&A. He specializes in unconventional resources in every major U.S. producing basin. Joshua graduated 2nd in his class with the highest academic honors from the Colorado School of Mines in 2000 with a BS degree in Petroleum Engineering and is an honorably discharged veteran of the United States Army.

History

The birth of our firm goes back to 1961 when Clarke Gillespie started his own petroleum engineering consulting firm and Aaron Cawley and Jimmie Harrington also started their own firm. The merger of the two firms led to the formation of Cawley, Harrington, and Gillespie, Inc., which was later changed to Cawley, Gillespie & Associates, Inc. (“CG&A”) with the departure of Harrington and the arrival of A. W. Augustson and Walter J. Evans. However, the roots of CG&A go back much further than 1961.

In the late 1930s or early 1940s, a Fort Worth based geological consulting firm Cummins, Berger, Pishney, and Brinkerhoff was providing services to the petroleum industry. Mr. Brinkerhoff lived in Houston and ran their offices there. In the late 1940s or early 1950s, this firm separated and Ralph Cummins continued to have an office in Fort Worth. Walter Berger became an independent consultant. Charles Pishney became associated with Burton Atkinson in the early 1950s, and they later separated in the early 1960s. Clarke Gillespie and Rush Vann shared offices with Atkinson and worked on joint projects together, and Gillespie later started his own firm in 1961.

In 1951, Wally Keller and L. F. Peterson left Stanolind Oil & Gas to form the engineering firm of Keller and Peterson in Midland. Jimmie Harrington and A. W. Augustson were employed by this firm in 1953 and shortly thereafter, their offices were moved to Fort Worth. Additional major hires by Keller and Peterson were Henry F. Calloway in 1954, Aaron Cawley in 1956, and Walter J. Evans in 1958. In 1972, Peterson left the firm of Keller and Peterson which became Keller and Augustson. Cawley and Harrington left Keller and Peterson in 1961 to form their own firm in Fort Worth which was later merged with Gillespie.

Cawley Gillespie & Associates, Inc. has continued business uninterrupted through the decades and today still delivers professional, ethical, and reliable engineering and geological services to the petroleum industry. Our longevity is a testament to the quality of our staff and services, and also to our long list of clients that have trusted CG&A for their engineering needs.

Aaron Cawley & Clarke Gillespie