
Acting for domestic and international mining majors and juniors, Guerrero Olivos also assists non-mining clients, such as private investment funds that have significant mining sector interests. The nine-strong group is experienced in a wide range of natural resources and metallic (and non-metallic) mineral mining, such as copper, lithium, gold, saltpeter, iodine, potassium, and limestone. Fusing regulatory mining and environmental expertise with significant corporate and financing specialisms, the full-service practice covers environmental and local community issues, as well as regulatory work, mining litigation, and project acquisitions and financings. It additionally advises on joint ventures, M&A, and royalty and streaming agreements. The department’s principal figures are: Pedro Lyon, a widely-respected mining project development and financing practitioner; ‘exceptional ally’ Marco Zavala, who acts for domestic and international mining companies, as well as investment funds, on both transactional and regulatory matters, including environmental and indigenous community issues; Benjamín Pérez, whose recent experience includes assisting with the sale of a major mining project; and María Paz Pulgar, an adviser on mining project acquisitions, developments and operations. In the associate pool, Ignacio Aswani specialises in mining developments, as well as regulatory issues, environmental matters and permitting processes; while Sebastián Mozó is another key member of the firm’s mining, water law and environmental law teams.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
- ‘Very close and professional approach to the various legal matters involving mining.’
- ‘Clients are consistently impressed by their exceptional dedication and meticulous attention to detail.’
- ‘The firm's commitment to excellence goes beyond mere professionalism, they genuinely prioritise understanding and addressing clients’ needs in a personalised manner.’
- ‘Their team always provides innovative legal solutions while fostering a relationship built on trust and mutual respect.’
- ‘Guerrero Olivos exemplifies the highest standards of expertise and client care, making them an indispensable partner for navigating complex legal matters.’
- ‘Good team whose attitude makes them very available to their clients.’
Key clients
- Fenix Gold
- Torq Resources
- Taurus Funds Management
- Pan American Silver
- Antofagasta Minerals (AMSA)
- GRA Investment
- SIMCO
- Santiago Metals
- Simbalik
- La Fortuna Resources
- Marimaca Copper
- Osisko Gold Royalties
Work highlights
Advising Fenix Gold on its $200m gold project in the Atacama region of Chile.
Advised Taurus Funds Management on the $195m acquisition of two royalties owned by Anglo American.
Advised Pan American Silver on the sale of its 57.75% stake in the Agua De La Falda Project, a joint venture with Codelco, to Rio Tinto.
Lawyers
Hall of Fame
The lawyers at the very top of the profession, widely known and respected by peers and clients for their longstanding involvement in market-leading work.

Next Generation Partners
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.
Leading associates
Leading associates with regular involvement in their team's key work, and recognition from peers or clients as being ones to watch.
Practice head
Pedro Lyon; María Paz Pulgar; Benjamín Pérez; Marco Zavala



