Lorenza Langarica O'Hea

Sergio Olivares, Sr. joined OLIVARES in 1987 and today leads the firm with strength and a commitment to transparency, client satisfaction, and personal service. He has been a partner since 1994 and Chairman of the Management Committee since 2009. Mr. Olivares’ breadth of experience is extensive; he is skilled in the prosecution and litigation of intellectual property rights, including trademarks, copyrights, patents, and unfair competition. He is proficient across all areas of intellect...

Julián holds a law degree from Escuela Libre de Derecho and a Master's Degree in Business Law from Universidad Panamericana. With more than a decade of experience in litigation matters, he has specialized in proceedings related to breach of commercial obligations, loan portfolio recovery, as well as restructuring and bankruptcy proceedings, successfully representing both creditors and companies with highly complex insolvency problems. Throughout more than ten years of professional prac...

Zarina Beltrán Betrón is a top attorney recognized by Best Lawyers in the practice area(s) of Franchise Law. Zarina, who practices law in Mexico City, Mexico, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Zarina is held by other top lawyers in the same geographic and legal practice area.

Founding Partner Born in Mexico City on January 29, 1968; He obtained his law degree (JD) at Universidad Anáhuac in 1992 and postgraduate course on business law at the Escuela Libre de Derecho in 1993-1994. Mr. Del Rio worked at Creel, García Cuellar & Mügenburg, S.C. for two years, and in Bufete Carrillo Gamboa, S.C. for eighteen years, being partner for such firm for the last nine years. He has focused his practice in corporate law, commercial Law, financial Law, fore...

PRACTICE AREAS Joint ventures, mergers and acquisitions, reorganizations, foreign investment; national and international government contract bidding process; energy, infrastructure and mining projects. ASSOCIATIONS Barra Mexicana Association. Institute of Energy Law. Rocky Mountain Mineral Law Foundation. Association of International Petroleum Negotiators. International Bar Association. PROFESSIONAL EXPERIENCE Firm member since 1996; worked as an international consultant in the private sector...

Justo Fernández del Valle is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate and Mergers and Acquisitions Law and Real Estate Law. Justo, who practices law in Mexico City, Mexico, has been recognized since 2014. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Justo is held by other top lawyers in the same geographic and legal practice area.

Ricardo Cajal is a top attorney recognized by Best Lawyers in the practice area(s) of Criminal Defense. Ricardo, who practices law in Mexico City, Mexico, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Ricardo is held by other top lawyers in the same geographic and legal practice area.

Carlos G. Guerrero Orozco is a litigation attorney and anti-corruption consultant based in Mexico City. He is a partner at the litigation firm López Melih y Estrada Abogados and co-founder of the non-profit DLM Mexico, which defends human rights through strategic litigation. He has advised and represented public and private companies, individuals, and international institutions including the Inter-American Development Bank, Transparency International, and the Cyrus Vance Center for Int...

Carlos A. Ochoa Valenzuela is a top attorney recognized by Best Lawyers in the practice area(s) of Administrative Law, Energy Law and Project Finance and Development Practice. Carlos A., who practices law in Mexico City, Mexico, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Carlos A. is held by other top lawyers in the same geographic and legal practice area.

From 2009 to 2012, Pedro was part of the Mexican Tax Administration Service (SAT). He worked in International Tax Audits, International Tax Legal Affairs, and Large Taxpayers Legal Affairs departments. Pedro participated in audits to foreign tax residents, the issuance of tax rulings, and exchange of information procedures with international authorities; he also attended Mutual Agreement Procedures (MAPs). From 2015 to 2016, Pedro was part of the SAT’s new Hydrocarbon Verification depar...