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Cawley, Gillespie and Associates, Inc.


6500 River Place Blvd, Bldg 3 Suite 200
Austin, TX 78730

Phone: 512.249.7000
Fax: 817.796.9260

The Austin office was established in 2002 and moved to its current Northwest Austin location in 2023. The River Place Office Park is nestled in the Hill Country with other O&G companies, and is a short drive to downtown Austin, Austin Bergstrom International Airport and Lake Travis.

Employee Spotlights in Austin

, Cawley, Gillespie & Associates
Senior Reservoir Engineer

Dario Navia

Dario is a senior reservoir engineer at CG&A and has been with the firm since 2012. His responsibilities include reserves and economic evaluations applying performance, analogy, volumetric/material balance methods, acquisitions/divestitures, resource studies in both conventional and unconventional formations, and reserve reports preparation routinely used for public company SEC/COGEH disclosures in the USA and Canada, public and private company financing and bank line-of-credit situations. He has experience in both conventional and unconventional resources from every major basin in the United States. Dario has a PgD in Fossil Fuel Energy and Emerging Technologies from Stanford University, graduated from the University of Utrecht (HvU), The Netherlands with a B.S. in Mechanical Engineering, and a Production Engineering Minor from Universidad Privada Boliviana (UPB), Bolivia. He is a member of the Society of Petroleum Engineers (SPE) and the Society of Engineers of Bolivia (SIB).

✯ Favorite outdoor activity in Austin?
“It is always a great experience kayaking at Lady Bird Lake and/or playing soccer at Zilker Park.”

, Cawley, Gillespie & Associates
Technical Analyst

Shelby Loskorn

Shelby is technical analyst and has been with the firm since 2009. She provides technical and administrative support to CG&A Engineers and Geologists, assisting in database management, reserve evaluation, creating reports, pricing and accounting services. Shelby graduated from the University of Tampa with a BA in Writing.

✯ Fun Fact?
“I'm a collegiate National Champion soccer player!”

Client Testimonials

“We have been working with Jeff Loskorn and his team in evaluations and audits of year-end reserves for the past five years. Jeff is one of the most knowledgeable, well rounded and expert Reservoir Engineers I have worked with. He has great understanding and ability to evaluate our asset in Austin Chalk in Caddo Parish Holdings. He is very flexible to work with and always available to answer questions and provide amicable solutions and accurate reserves evaluations.”

Amol BhavsarStranded Oil Resources

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