Mario A. Boisselier

Christopher L. Drymalla is a top attorney recognized by Best Lawyers in the practice area(s) of Patent Law. Christopher L., who practices law in Austin, Texas, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Christopher L. is held by other top lawyers in the same geographic and legal practice area.

W. Glenn Opel is a top attorney recognized by Best Lawyers in the practice area(s) of Energy Law and Public Finance Law. W. Glenn, who practices law in Austin, Texas, has been recognized since 2006. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which W. Glenn is held by other top lawyers in the same geographic and legal practice area.

Ronald F. Bradshaw is a top attorney recognized by Best Lawyers in the practice area(s) of Employee Benefits (ERISA) Law. Ronald F., who practices law in Austin, Texas, has been recognized since 2009. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Ronald F. is held by other top lawyers in the same geographic and legal practice area.

Eric Nichols practices both civil trial and criminal law, and joined the Austin office of Butler Snow in 2019. His background includes not only many years representing companies and individuals in private practice but also experience in both Texas state government and the federal government, having served as Deputy Attorney General for Criminal Justice for the Office of the Texas Attorney General, as an Assistant United States Attorney for the Southern District of Texas, and a law clerk to a ...

David R. Keyes represents companies and financial institutions with respect to loans and deposits, structured finance and securitization, project finance, sales of financial assets, energy transactions, check clearing and bank payments systems, letters of credit, bankers acceptances, loan workouts, lender liability, bank insolvencies and related acquisitions, reorganizations and conveyances, and in financial and commercial transactions in the energy, financial institutions, and technology ind...

Tim George practices administrative law and litigation on behalf of oil and gas owners and operators. Tim represents clients before the Railroad Commission of Texas and the Texas General Land Office. He has helped solve complex problems with leasehold permitting and production; special field rules; rulemaking; salt water disposal injection; unitization and enhanced recovery; environmental compliance and remediation; pipeline transportation; common carrier, common purchaser, and gas utility co...

Though divorce can be an emotional, life-changing event, Rob Frazer offers stability, experience, and guidance to put clients at ease and on a positive path forward. Rob approaches all of his cases with the perspective gained as a seasoned and confident litigator. He communicates well with clients to dispel the myths and misconceptions they may have about divorce. He assures them there is a legal process in place to protect their interests, relieving them of unreasonable fears. Drawing on his...

Kevin represents a diverse clientele in virtually all aspects of the energy industry. With a background in petroleum geology, he has operated and participated in oil and gas exploration and development projects across North America. As a transactional lawyer, he has represented owners and operators with documentation, due diligence, and business counseling for acquisitions and divestitures and for exploration and operation. As a trial lawyer, he has represented plaintiffs and defendants, both...

Kelly Ausley-Flores is a Partner at Goranson Bain Ausley in Austin, Board Certified in Family Law by the Texas Board of Legal Specialization, with more than 25 years of experience. She has been recognized in The Best Lawyers in America© for Family Law and Collaborative Law since 2012, and for Family Law Mediation since 2024. She has been named Austin “Lawyer of the Year” multiple times. Kelly is also included in LawDragon’s 500 Leading Family Lawyers (2024–2026) a...

Mark Stratton has broad experience in the areas of commercial, partnership, oil and gas, real estate, transportation, securities, construction, products liability, professional liability and personal injury litigation. Mark is Board Certified in Civil Trial Law by the Texas Board of Legal Specialization and has tried more than 50 cases to verdict in both state and federal courts, including some of the most challenging jurisdictions in the country. He has also argued cases before the Supreme C...