Castilla Ulises

Ulises Castilla Flores

Baker & McKenzie Abogados, S.C.


Ulises Castilla is a partner in Baker McKenzie's Tax Practice Group in Mexico City. He has more than two decades' experience on tax dispute resolutions and the advising tax strategies for the business sector, and is a seasoned litigator in the private and public sectors. Prior to joining the Firm, Ulises was the central litigation administrator of large taxpayers for the Tax Administration Service, a decentralized body of the Ministry of Finance and Public Credit. Ulises has spoken on tax matters in seminars organized by the Mexican Bar Association and the University of California, among other associations and universities.

Practice Focus

Ulises' practice focuses on tax dispute resolutions area, including conclusive agreements (alternative dispute resolutions), administrative appeals, nullity suits, and constitutional appeals (amparos), also He has a lot experience in tax audits. He has been recognized by last year rankings published by Latin America Chamber and Partners and by the International Tax Review, this latter recognizing me among the top tax controversy practitioners in Mexico.

Professional Associations and Memberships

  • Tax Law Commission - Member
  • IFA Commission of Court Precedents - Coordinator, Mexico Division
  • The Bar Association, Colegio de Abogados A.C. - Member


  • Mexico (1992)


  • Universidad Tecnologica de Mexico (Masters International Business) (2006)
  • Universidad Autónoma de Nuevo Leon (Master Degree Tax) (2001)
  • Universidad Panamericana (Post Graduate Studies Constitutional Law) (1999)
  • Universidad Tecnologica de Mexico (Post Graduate Studies Labor Law) (1995)
  • Universidad Tecnologica de Mexico (Law Degree) (1992)


  • English
  • Spanish