- Maurer School of Law Academy of Law Alumni Fellows (2001)
- J.D. 1979
Villarreal is an attorney in San Antonio with a distinguished background in the legal, business, and non-governmental sectors. He serves as a senior advisor to the law firm of Akin Gump Strauss Hauer & Feld. He also serves on a number of private and non-profit corporate boards, including the Union Pacific Corporation, First Solar, Inc., PMI Group, Inc., the Center for American Progress, and the New America Alliance.