Gilberto Siller


Phone 1-830-443-9067

Fax  1-210-417-4206


Gilberto Siller is the founding member of The Siller Law Firm and is based in Boerne, Texas. His native language is Spanish and is fluent in English and French. His living in Mexico and the United States and doing business throughout Latin America and Western Europe has enhanced his first-hand knowledge of United States, European and Latin American cultures.

Mr. Siller’ practice focuses primarily on representing business people and investors from Mexico doing business in the United States. He has broad experience working on corporate and business matters and is a frequent speaker on topics such as the legal aspects of doing business in the United States, and particularly the State of Texas, to various groups in Mexico and the United States.

Mr. Siller formed the firm in 2012. He received his Bachelor of Arts from the University of Pennsylvania in 1995, his Masters of Science in Foreign Service from Georgetown University in 1999, and his Juris Doctor from St. Mary’s University School of Law in 2006.

In addition to his general areas of practice, he has experience in private equity financing, international market research and business consulting.

Pratice Areas

Not certified by the Texas Board of Legal Specialization
  • Transactions
  • Corporate
  • Joint Ventures
  • Real Estate
  • External General Counsel
  • Management of Cross-Border Litigation

Education & Bar Admission

Admitted to practice law in Texas

Juris Doctor, St. Mary’s University School of Law: 2006

Masters of Science in Foreign Service, Georgetown University: 1999

BA, University of Pennsylvania; 1995

U.S. – Mexico Bar Association

American Bar Association

Former President of the San Antonio Bar Association – International Law Section

St. Mary’s Law Journal – Editor