Photo of Leo  Unzeitig

Leo Unzeitig



Georgetown University Law Center, LL.M. in Taxation, with distinction, 2016

St. Mary’s University School of Law, J.D., magna cum laude, 2015

Trinity University, M.S. in Accounting, 2012

Trinity University, B.S. in Business Administration, 2011


Named Rising Star, Texas Legal Awards 2023

Best Lawyers in America: Ones to Watch, 2022-2024

Named “Texas Rising Star” by Texas Super Lawyers, 2022-2023

Scene in S.A., San Antonio’s Best Lawyers, Tax Litigation

Fellow, Texas Bar Foundation

Dean’s List, Georgetown University Law Center

Dean’s List, St. Mary’s University School of Law

Member, John Harlan Society, St. Mary’s University School of Law

Recipient, Ernst & Young Academic Excellence Scholarship

Bar Admissions


Board Certified Tax Law, Texas Board of Legal Specialization

Court Admissions

U.S. Tax Court


Law Clerk, The Honorable Juan F. Vasquez, United States Tax Court, May 2016 – June 2017

Intern, The Honorable David Alan Ezra, United States District Court for the Western District of Texas, January 2014 – March 2014


Leo Unzeitig is a shareholder in Chamberlain Hrdlicka’s San Antonio office. He assists with a wide range of federal tax controversy and litigation matters at all stages before the Internal Revenue Service and federal courts. Leo also advises on tax planning and transaction matters, including state and local tax issues.

For several semesters, Leo was an adjunct professor at the University of the Incarnate Word teaching Tax Research.  He also regularly enjoys counseling taxpayers through the Tax Court Pro Bono Program sponsored by the State Bar of Texas Tax Section and takes great pride in being a contributing member of the Texas Society of CPAs Federal Tax Policy Committee.

Before joining Chamberlain Hrdlicka, Leo served as a judicial law clerk to the Honorable Juan F. Vasquez of the U.S. Tax Court in Washington, D.C. Leo is also a Certified Public Accountant and Board Certified in Tax Law by the Texas Board of Legal Specialization.


  • Certified Public Accountant
  • Board Certified in Tax Law by the Texas Board of Legal Specialization
  • Graduate of the State Bar of Texas Tax Section Leadership Academy

Professional Affiliations

  • Fellow of the Texas Bar Foundation
  • Fellow of the San Antonio Bar Foundation
  • Federal Bar Association
  • Texas Society of Certified Public Accountants
  • San Antonio CPA Society
  • American Bar Association, Tax Section
  • San Antonio Bar Association
  • William S. Sessions American Inn of Court
  • Federal Tax Policy Committee of the Texas Society of CPAs

About Chamberlain Hrdlicka

Chamberlain Hrdlicka started as a tax boutique firm in 1965. While Chamberlain Hrdlicka has expanded with offices nationwide, the tax practice remains the core strength of the firm, with approximately half of our total lawyers practicing in one of the varied fields of tax law. Many of our attorneys are board certified in tax law or estate planning or related areas and have worked with the IRS, the Department of Justice Tax Division, and the Tax Court. The Firm represents a wide range of large multinationals and public companies, privately held businesses, partnerships and joint ventures, individuals, and estates and tax-exempt organizations in a broad range of business advisory, transactional, litigation, and collection matters.




Seminars & Presentations

  • Tax Controversy Update: Judicial Highlights and Taxpayer First Act of 2019, Chamberlain, Hrdlicka, White, Williams & Aughtry 2nd Annual Tax and Business Planning Seminar, November 2019
  • Tax Controversy and Tax Reform Update: Recent Developments in Tax Reform (Including Section 199A and Other Issues) and a Review of The New Partnership Audit Rules, Laredo Tax and Business Planning Seminar, July 2019
  • Judicial Highlights and the New Partnership Audit Rules, Chamberlain Hrdlicka 1st Annual Tax and Business Planning Seminar, December 2018
  • What You Need to Know About the Tax Cuts and Jobs Act, San Antonio CPA Society, February 2018