(52) (55) 5261 0496
drangel@basham.com.mx
CDMX

Diana Rangel León

Constitutional Law / Administrative / Environmental / Regulatory / Litigation
Counsel
EDUCATION

Universidad Panamericana.
Master’s degree in Constitutional and Human Rights Law. 2012–2014. Professional License: 11037263. Thesis: 'Constitutional Review by Administrative Authorities. Analysis of Direct Amparo Review 1640/2014-SS'.

University of Salamanca, Spain.
Specialization in Constitutional Law. January – February 2011.

Thesis: 'The Inclusion of the Opening Clause in the Mexican Constitution'.

UNAM Faculty of Law, National Autonomous
University of Mexico. Bachelor’s degree in law. 2000-2005. Professional License: 5287316. Thesis: "Legal analysis of the contract of the pension system”.
LANGUAGES

Spanish: Native.
English: Professional proficiency

PERFIL PROFESIONAL

Since 2023, I have led the consulting and litigation area in administrative, regulatory, and government relations matters, as well as anti-corruption and corporate administrative liability at Basham. I have extensive experience advising national and foreign companies and providing counsel in administrative proceedings, contentious-administrative and constitutional (amparo) trials in various fields.

Previously, I served as Law Clerk (Secretaria de Estudio y Cuenta) at the Supreme Court of Justice of the Nation for seven years, where I worked on matters of national importance in areas such as education, environmental, anti-corruption, administrative liability, water rights, discrimination, indigenous law, and consumer protection. I also served as Technical Secretary at the Federal Judiciary Council, analyzing administrative liability proceedings against Federal Judges and Magistrates, and prepared reports for the Inter-American Commission on Human Rights regarding such proceedings.

I served as Advisor to the Mexican Congress on constitutional reforms in education, energy, access to information, anti-corruption, political-electoral, and financial matters.

PROFESSIONAL EXPERIENCE 

  • Basham, Ringe y Correa, S.C. Counsel. Dec 2022 – Present.
  • Supreme Court of Justice of the Nation. Law Clerk. May 2015 – Dec 2022.
  • Federal Judiciary Council. Executive Secretariat of Discipline. Technical Secretary. September 2020 – April 2022.
  • Chamber of Deputies. Advisor on Constitutional and Human Rights Matters. May 2013 – May 2015.
  • Supreme Court of Justice of the Nation. First Chamber. Junior Lawyer. November 2009 – August 2011.
  • Various positions as Secretary and Court Clerk at Federal Collegiate Courts and District Courts.
  • National Commission of the Retirement Savings System. General Directorate of Regulations. Legal Analyst. January – December 2006.
  • Faculty of Law, National Autonomous University of Mexico. 'Practical Law Teaching Laboratory'; approved by the University Council of UNAM. Teaching Assistant. February – December 2005.

AWARDS AND RECOGNITIONS 

  • Pro bono TrusLaw 2024 award.
  • Thomson Reuters Stand-out Lawyer 2025

RELEVANT MATTERS

Since leading the administrative litigation and consulting practice, I have had the opportunity to represent multinational companies from various sectors in strategic cases, as well as to design prevention strategies and legal audits in regulated and highly regulated industries, as follows:

  • Obtained a favorable ruling declaring the unconstitutionality of an article of the Gasoline Import Agreement for a multinational automotive company.
  • Critical regulatory strategy that enabled a significant M&A transaction. Included due diligence and advice for obtaining essential environmental and regulatory permits at the time of signing the Stock Purchase Agreement.
  • Obtained favorable environmental rulings, arguing that the regulation cited outdated international sources and failed to meet its regulatory purpose. Following this ruling, the government initiated a formal review of the regulatory framework.
  • Mexico's first case to access the benefits of cooperation with anti-corruption authorities based on an employee report. The company was exonerated of liability.
  • Constitutional victory at the Supreme Court of Justice of the Nation in a key case on environmental federalism. The case set a fundamental precedent on governmental competencies in environmental regulation and protected the client's legitimate interests against technically deficient regulations.
  • Constitutional injunction (amparo) against entry barriers at a strategic port in Mexico.
  • Successful annulment, via amparo, of a multimillion-dollar fine imposed by the Antitrust regulator. Achieved the unconstitutionality of a key article in the applicable regulations.

PUBLICATIONS 

  • AML Regulations Manual.ANADE: National Association of Business Lawyers, Bar Association, A.C. 2025.
  • Restitution of Indigenous Cultural Property in Mexico: Legal Framework and Current Challenges. American Bar Association, Section of International Law. 2025
  • AML Regulations and the Art Market: A Comparative Study, Chapter: Mexico. Center For Art Law, Inc., New York, 2025.
  • Manual for Judging with a Gender Perspective in Administrative Matters. Supreme Court of Justice of the Nation. 2022. Coordinator of the manual. Participated in the preparation of the manual with a practical approach to gender issues in administrative matters.
  • Manual for Judging with a Gender Perspective in Labor Matters. Supreme Court of Justice of the Nation. 2021. Author of the chapter: 'The Gender Pay Gap'. La brecha salarial de género.
  • Various publications for Compliance LATAM – Internal Investigations Guide, Comparative Compliance Guide in the Health Industry..
  • Various publications for Abogado Corporativo Magazine of ANADE. National Association of Business Lawyers, Bar Association, A.C., and Abogadas MX. Women Lawyers Association.

LECTURES AND PRESENTATIONS

  • Preventive Measures under the New Water Regulation: Recommendations and Legal Risks.. International Chamber of Commerce Mexico. Corporate Intelligence and Risk Management Commission, 2025.
  • Supreme Court Ruling on the Obligation to Inform Consumers about the Content and Conditions of Service Provision.ANADE. National Association of Business Lawyers, Bar Association, A.C., 2025.
  • Restitution of Indigenous Cultural Property in Mexico.Art & Cultural Heritage Law Committee, American Bar Association, 2024.
  • Restitution of Indigenous cultural property.Annual Conference of the International Bar Association, 2024.
  • Speaker at seminars on combating inequality, economic, social, and cultural rights, and the role of justice in law schools.
  • Various courses at the Casas de la Cultura Jurídica of the Supreme Court of Justice of the Nation.

INSTITUTIONAL POSITIONS

Vice-Coordinator of the Anti-Corruption and Anti-Money Laundering Committee, ANADE, National Association of Business Lawyers, Bar Association, A.C.

ASSOCIATIONS

  • ANADE: National Association of Business Lawyers, Bar Association, A.C.
  • IBA: International Bar Association
  • Lex Mundi
  • Abogadas MX