About Us
We are a highly respected law firm with a reputation for excellence.
For over two decades, we combined our professional paths to create LAFONTAINE & ROMERO PARKER, a firm that has upheld the highest standards of quality and efficiency in its services, grounded in four essential principles: commitment to our clients, offering expert representation and objective counsel; the pursuit of cost-efficiency through a team-based approach; collaboration and adaptability, ensuring practical advice and consistent communication with clients; and its commitment to the community, engaging in legal initiatives and supporting philanthropic causes.
The firm is distinguished by its client-focused approach, operational efficiency, and meaningful social impact, reflected in contributions to the community and to the development of the legal profession in Mexico.
We offer ongoing, unrestricted legal guidance and support, reinforced by advanced technology, from contract initiation to final resolution.
Our partners personally manage every case, providing direct representation without delegation.
Our founding partners
Attorney José Luis Romero Díaz
José Luis Romero Díaz has practiced law for over 17 years. He is a distinguished legal professional.with extensive academic training and a successful career in the legal field.
Recognized by the Supreme Court of Justice of the Nation as the top young attorney in 2015, 2016, and 2017, in recognition of his role in shaping critical jurisprudence on criminal procedure and constitutional safeguards.
Author of several national and international articles, as well as the book titled: Procedimientos Especiales en el Nuevo Sistema Penal Acusatorio, Adversarial y Oral “Casos Prácticos”
Copyright registration number:
03-2013-090613490600-01
Academic Training
- Bachelor’s Degree in Law (Universidad Tecnológica de México, 2004–2007), with Honors. Professional License Number: 5359191
Postgraduate Studies with High Distinction
- Master of Science in Criminal Law (Universidad Anáhuac Norte), Professional License Number: 7410830
- Specialization in Criminal Law (Universidad Anáhuac Norte), Professional License Number: 7361580
- Specialization in Criminal Amparo (National Institue of Criminal Sciences).
- Postgraduate Specialization in Human Rights (Inter-American Court of Human Rights, San José, Costa Rica)
- Advanced Course in Oral Litigation Techniques, (University Of San Diego School Of Law USD) Diploma Program, 2023
- Diploma and International Certification in Criminal Litigation, 2015, completed in Santiago, Chile (Universidad Alberto Hurtado).
Professional Experience
José Luis Romero Díaz, has worked in various public and private institutions, holding prominent roles primarily as a representative in some of the most impactful litigation matters in Mexico,, serving as lead counsel in some of the most impactful litigation matters in Mexico, acting as defense attorney or legal advisor to victims and government entities. He has also served as a professor at various universities across the country and the Americas.
Attorney José Lafontaine Hamui
José Lafontaine Hamui is a practicing attorney with over 25 years of legal experience, having built his career as a litigator in criminal and administrative law.
Academic Training
- Bachelor’s Degree Bachelor’s Degree in Law from Universidad Intercontinental
Degree awarded upon submission of the thesis: Proposal to add Section V to Article 2361 and to introduce Article 2360 bis to the Federal Civil Code and the Civil Code for the Federal District. August 2001.
- Specialization: Postgraduate Specialization in Criminal Law, Universidad Anáhuac México Norte
- Master’s DegreeMaster of Science in Criminal Law, Universidad Anáhuac México Norte
Professional Experience
- 1994-1996: Ibañez, Garcia Naranjo y Asociados, S.C., Law Firm Position: Law Clerk
- 1996-1999: Hamdan Manzanero y Asociados, Law Firm Position: Law Clerk and Attorney
- 1999-2013 Lafontaine Abogados, S.C., Law Firm
- Position: Managing Partner
- 2013– Lafontaine & Romero Parker Abogados, Law Firm
- Other Activities: Federal Delegate for the State of Yucatán at the Federal Attorney’s Office for Environmental Protection (PROFEPA)
Partner
Attorney Guillermo Martínez Sosa
Guillermo Martínez Sosa has over 25 years of experience as a practicing attorney and educator, with professional practice across various areas of criminal law.
Academic Training
- Bachelor’s Degree in Law from the Universidad Tecnológica de México.
- Specialization in Criminal Law.
- Diploma Program in Criminal Amparo.
- Diploma Program in Technical Criminalistics Expertise and Modern Trends in the Criminal Justice System.
Institutions where we received our legal training
Areas of legal expertise
We provide continuous legal training across multiple practice areas for law students, attorneys, public servants, and the general publicthrough the Center for Legal and Forensic Sciences Research.Through this platform, our firm's attorneys lead continuing legal education courses alongside some of the most distinguished legal educators in the Americas, particularly from the United States, Mexico, Argentina, and Chile.
English 
Spanish