Petroleum Consulting, Since 1960

Reliable Reserve Reports… On Time

Strong Reputation, Disciplined Professionals


Cawley, Gillespie and Associates, Inc. (CG&A) began serving the oil and gas industry over 50 years ago. Though our methods and tools have evolved since that time, our values have not. We still provide ethical and independent petroleum engineering services. Our extremely capable team of professionals consists of a broad range of experience and capabilities to serve your petroleum consulting needs. Let us show you the service you deserve… responsive engineers and geologists delivering reliable property evaluations… on time.


  • Fort Worth

    CG&A’s main office in Fort Worth is located downtown in the historic Fort Worth Club Building. Built in 1926, the façade has the architectural charm of two generations ago. Downtown is the heart of Fort Worth, where millions of people visit for dining, shopping and entertainment, and others who work and live.

    306 West 7th Street, Suite 302 Fort Worth, Texas 76102
    Phone: 817.336.2461
    Fax: 817-796-9260

  • Houston

    The Houston office of CG&A is located in the Wells Fargo Building of downtown Houston, one of the most visually striking in the downtown area. The CG&A office is located in the heart of downtown, very close to numerous oil and gas companies, hotels, restaurants and professional sports arenas.

    1000 Louisiana, Suite 1900 Houston, Texas 77002
    Phone: 713.651.9944
    Fax: 817-796-9260

  • Austin

    The Austin office was opened in 2002 in the beautiful wooded campus of AmberOaks Corporate Center in Northwest Austin. Near the intersection of Hwy 183 and Texas Toll 45 (Ranch Road 620), our office is within a short drive of downtown Austin, Austin Bergstrom International Airport and Lake Travis.

    13640 Briarwick Drive, Suite 100 Austin, Texas 78729
    Phone: 512.249.7000
    Fax: 817-796-9260