Colombia
3

Energy and natural resources

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Arrieta Mantilla & Asociados

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Lawyers at Arrieta Mantilla & Asociados ‘provide a perfect combination between the legal and the technical’, according to clients. The group leverages the wider firm’s public law firepower to excel in advising energy and natural resources companies on administrative law proceedings. Arguably best known for its work in the mining sphere, where it advises longstanding clients Carbones del Cerrejón, Drummond and Cerro Matoso on various public law, regulatory and contentious issues, the team also handles electricity and hydrocarbons-related work. Public law veteran Carlos Gustavo Arrieta provides ’excellent analysis and practical solutions’ and co-heads the department alongside Yady Villaquirán, who oversees the mining law area.
Legal 500 Editorial commentary

Testimonials

Collated independently by Legal 500 research team.

  • ‘The firm is characterised by its personalised attention; once it understands the legal problem, it provides advice tailored to the client's legal needs, avoiding actions or delays in solving the problem.’

  • ‘The partners are assertive in their solutions and at the same time warm in handling client situations, which provides great peace of mind and trust.’

  • ‘Yady Villaquirán is characterised by her availability and her ability to comprehensively understand the situation in order to provide the best solution according to our needs.’

  • ‘The team provides experienced analysis of various problems. We highlight Gustavo Arrieta for his excellent analysis and practical solutions.’

  • ‘A team of highly professional and trained lawyers for specific requirements. Strong technical and legal knowledge that is reflected in a solid and comprehensive defence.’

  • ‘Lawyers stand out for their kindness, good treatment and professionalism. They provide a perfect combination between the legal and the technical, offering clear and forceful advice.’

Key clients

  • Carbones del Cerrejón and Cerrejón Zona Norte
  • Drummond
  • Cerro Matoso
  • Continental Gold
  • Celsia
  • Anglogold Ashanti
  • Orica Colombia and Orica Norway
  • ConocoPhillips
  • Asociación Colombiana del GLP- Gasnova

Work highlights

Advised Carbones del Cerrejón and Cerrejón Zona Norte on various mining and public law issues, including representation in administrative proceedings before mining sector agencies and certain jurisdictional authorities.
Represented Cerro Matoso in a judicial process related to a nullity action held by the client against Contraloría General de la República as a result of a fiscal liability judgment issued by that authority.
Advised Anglogold Ashanti on public, mining and energy law matters, including leading the company’s legal strategies in relation to local measures that may affect the company’s interests.

Lawyers

Practice head

Gustavo Arrieta; Yady Villaquirán