El Paso

221 N. Kansas, Suite 1700
El Paso, TX 79901
Phone: 915.533.4424
Fax: 915.546.5360


2905 San Gabriel St, Suite 205, 
Austin, TX 78705
Phone: 512.320.5466
Fax: 512.320.5431

Las Cruces

3800 E. Lohman Ave., Suite C
Las Cruces, NM 88011
Phone: 575.527.0023
Fax: 915.546.5360

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Antonio "Tony" Castillo

Email: antonio.castillo@kempsmith.com
Telephone: 915.546.5379 / Fax: 915.546.5360

Antonio “Tony” Castillo is an associate in the firm's Business Department. His practice focuses on business and corporate law, federal and state tax, international tax, and estate planning.

Tony has substantial experience in international tax compliance, international estate planning, and domestic and international corporate structuring. Tony has represented individuals and businesses before the IRS on a variety of matters including international delinquent returns and FBAR compliance, employment tax audits, and federal excise tax registration and compliance.

Tony is a native El Pasoan and fluent in Spanish. He is a proud graduate of the University of Texas at El Paso. He received his law degree from Rutgers University School of Law and an LL.M in Taxation from the University of San Diego School of Law.



  • Rutgers University School of Law, J.D., 2008
  • University of San Diego School of Law, LL.M in Taxation, 2017
  • University of Texas at El Paso, B.A., 2005


  • Texas, 2008
  • U.S. District Court for the Western District of Texas, 2011

Professional & Civic Involvement

Junior Achievement of El Paso, Board Member
Progress 321, Member