Alexander Letonja

Zandra Valenzuela is a lawyer recognized by Best Lawyers in the practice area of Family Law. Zandra practices law in Santiago, Chile Best Lawyers has recognized Zandra Valenzuela since 2026. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Zandra Valenzuela is held by other lawyers.

Miguel Aylwin Oyarzún is a lawyer recognized by Best Lawyers in the practice area of Arbitration and Mediation. Miguel practices law in Santiago, Chile Best Lawyers has recognized Miguel Aylwin Oyarzún since 2026. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Miguel Aylwin Oyarzún is held by other lawyers.

Roberto Sepúlveda Olavarría is a lawyer recognized by Best Lawyers in the practice area of Energy Law. Roberto practices law in Santiago, Chile Best Lawyers has recognized Roberto Sepúlveda Olavarría since 2025. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Roberto Sepúlveda Olavarría is held by other lawyers.

Roberto is the founding partner of our law firm. As senior partner, he gives legal, real estate and commercial assistance to both profit and non-profit entities, such as companies, educational foundations and institutes of public studies. He served as President and/or Director of the following companies and institutions: Vera and Giannini Impresores S.A.; Bosca Chile S.A.; Pizza Hut Chile; Constructora San Fernando S.A.; HK Human Capital S.A.; Ossandón Corredores Asociados S.A.; Santa ...

Paola is the head and Partner of the Environment and Natural Resources department of Ossandón Abogados. She focuses her practice on providing environmental consultancy on matters relating to administrative requests and defences before public and judicial authorities, environmental auditing reports, residual waste management, infraestructure, energy and water, among others. Previously, she worked as environmental advisor for the Mayor of the Metropolitan Region of Santiago, advising the...

Josemaría Romero Evans is a lawyer recognized by Best Lawyers in the practice area of Real Estate Law. Josemaría practices law in Santiago, Chile Best Lawyers has recognized Josemaría Romero Evans since 2024. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Josemaría Romero Evans is held by other lawyers.

Abogado Litigante LLM in Trial (CWSL, USA, 2016). Especialista en Derecho Penal Económico y de la Empresa (U Castilla - La Mancha, España (2011). Asistente al I Programa Internacional para Abogados y Consejeros en Defensa de Derechos Fundamentales ante los Tribunales Internacionales (Siracusa, Italia, 2017 - 2018). Profesor de Derecho Penal Económico y Litigación Estratégica en Chile, Perú, Argentina, Ecuador y España. Presidente del Colegio de...

María Soledad Diharasarri L. is a lawyer recognized by Best Lawyers in the practice area of Real Estate Law. María Soledad practices law in Santiago, Chile Best Lawyers has recognized María Soledad Diharasarri L. since 2023. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which María Soledad Diharasarri L. is held by other lawyers.

Expert in water law, natural resources and project development. His practice focuses on administrative and judicial procedures, the preparation of legal reports and opinions, and the preparation of legal strategies for the development of all types of investment projects, both for national and international clients. He also has experience in due diligence processes and in the preparation and negotiation of contracts. He has also been involved in the development of Chilean creative industries, ...

University Studies Universidad de Chile, School of Law, 1996. Maximum Distinction. Admitted to practice by the Supreme Court of Justice, 1999. Post graduate Master of Laws (LL.M, with honours), Northwestern University, Chicago, Illinois, United States of America, 2001. Academic and Professional Activities Professor in Commercial Law Designated by an Open Competition Based on Records of Service and a Competitive Examination, School of Law, Universidad de Chile, 2016 to date. Professor in Comme...