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Mark Sessions

Senior Counsel
fax +1 210.258.2728

Mark Sessions litigates complex business and commercial disputes which frequently involve contract, banking, financial services, and shareholder / partner issues, as well as business torts and construction claims.

As a AAA Arbitrator, he decides commercial and employment claims. As a mediator, he facilitates settlement of a wide range of disputes. His insights gained from addressing client issues and opportunities in a breadth of practice settings – – national firm, telecom general counsel, small office/solo practitioner, arbitrator, and mediator – – enable him to solve complicated legal and business issues efficiently, as balanced and perceptive counsel with advanced problem-solving skills.

Mark litigates in state, federal and bankruptcy courts, and administrative venues. Representative disputes involve banking, commercial contracts, mortgages, partnership/corporate rights, breach of fiduciary duty and shareholder oppression, non-compete, franchise, securities and FINRA claims, commercial construction, and copyright.

Prior to joining Clark Hill, he served as general counsel of an international long-distance telecom provider, focusing on commercial contracts, licenses, privacy compliance, corporate transactions, state, local, and foreign telecom tax, and ESOP formation and compliance. He also provided day to day legal support to the management teams and general labor & employment advice.


J.D., Baylor Law School, Baylor University, Waco, Texas, 1981
B.S., Southwestern University, Georgetown, Texas, 1978, Political Science


Named among The Best Lawyers in America® for Arbitration by Best Lawyers (2023-2024)

Named among the Best Lawyers in America® for Commercial Litigation by Best Lawyers (2024)

Named among the Best Lawyers in America® for Litigation-Banking and Finance (2024)

Named among the Best Lawyers by San Antonio Scene Magazine (2013)


American Arbitration Association, Arbitrator for Commercial Arbitration Panel

American Bar Association, Judicial Division, Lawyers Conference, Chair (2018-2019)

American Bar Association, Young Lawyers Division, former Chair, former Delegate, House of Delegates (1993-2008), Judicial Division, Executive Committee of the Lawyers Conference, Chair of the Program Committee

State Bar of Texas, Chair, former MCLE Committee

San Antonio Bar Association, Officer and Director

State Bar Licenses


Court Admissions

U.S. Supreme Court
U.S. District Ct., E.D. of Texas
U.S. District Ct., N.D. of Texas
U.S. District Ct., S.D. of Texas
U.S. District Ct., W.D. of Texas
U.S. Court of Appeals, 5th Circuit