TEAM
DIEGO CALONJE
Counsel Partner
Buenos Aires
With more than 10 years of experience in the mining industry, Diego has an extensive career in the sector, with the unique perspective of having held relevant positions in the government field, in law firms and in companies. Throughout his career he has addressed a broad spectrum of legal matters, including regulation, social and environmental governance (ESG), corporate law and contracts. In many of these roles, he also led external relations and liaison with key government and civil society actors.
LANGUAGES
Spanish and English.
EDUCATION
SAÏD BUSINESS SCHOOL, University of Oxford
Leading Sustainable Corporations, 2024.
UNIVERSIDAD AUSTRAL, Buenos Aires, Argentina
Master's Degree in Administrative Law and Economic Regulation, 2000.
Law degree, 1998.
PROFESSIONAL EXPERIENCE
- Counsel Partner at MHR | Martinez de Hoz & Rueda (Buenos Aires, 2026-present).
- Director of Legal and External Affairs at Rio Tinto (Buenos Aires/Salta, 2022–2025).
- Partner at Alfaro Abogados (Buenos Aires, 2020–2022).
- Advisor on energy matters at the Legal and Administrative Secretariat and Secretariat of Energy, Ministry of Economy of the Nation (Buenos Aires, 2020–2022).
- National Director of Mining Investments en Secretaría de Minería de la Nación (Buenos Aires, 2015–2019).
ACADEMIA
He is a professor of Administrative Law and Mining Law in master's programs at the National University of Catamarca, the Catholic University of Salta, the Austral University, the National University of La Plata and the University of Belgrano, among others. He has been a speaker at numerous conferences and has published several articles and works on mining law and administrative law.
PRACTICES
Mining
Business Law
M&A