Partner

Lawyer

Carlos Hamann

Languages

Spanish
English

Carlos Hamann heads the Energy and Climate Change practice at CMS Grau. With more than 20 years of experience as an attorney, he specializes in energy, natural resources, dispute resolution, and foreign investment.

His practice focuses on advising foreign investors on large-scale strategic projects in the energy and natural resources sectors, including concessions, license agreements, farm-in/farm-out arrangements, and private contracts. He has advised clients in major public tenders and bidding processes promoted by the Peruvian government in the energy sector, supporting them from the clarification and pre-award stages through contract negotiation and execution.

Carlos has acted as counsel, expert, and arbitrator in commercial and investment disputes, including proceedings before the International Centre for Settlement of Investment Disputes (ICSID) involving claims exceeding USD 500 million.

He is also a university lecturer, columnist for specialized publications, and an active member of key energy-sector institutions, including the Association of International Energy Negotiators (AIEN), the Foundation for Natural Resources and Energy Law (FNREL), and Fundación Pronaturaleza, where he currently serves as Vice President.

Previously, Carlos served as Legal Manager and Government Affairs Director at SAVIA Perú (KNOC and ECOPETROL).

Awards & Recognitions

01 –

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"Carlos Hamann is very assertive and experienced in the sector and has a special sensibility when it comes to complex issues.”

Chambers & Partners Latin America 2026 | Band 1
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“Excellent disposition, empathy, and connection with the company's position and the relevance of the challenges they are entrusted with. Prompt and dedicated service.”

Legal 500 2026 - Leading partner | Band 1
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“Carlos Hamann provides quick responses, and is very assertive and a good team leader.”

Chambers & Partners Latin America 2025| Band 1

Relevant experience

Enagas International S.L.U. | Advised the Spanish international energy company in the Gasoducto Sur Peruano matter concerning the termination of a concession agreement by the Peruvian government (USD 4.1 billion). This cross-border matter involves a shareholder dispute, an investment arbitration proceeding before ICSID in Washington, D.C., and insolvency proceedings involving the concessionaire company.
PETROPERU | Advised the state-owned oil company on obtaining the necessary authorizations for the assignment of 75% of its interest in the license agreement for the exploration and exploitation of hydrocarbons in Block 64, located in the northern Peruvian rainforest, to Geopark Perú S.A.C.
Sapet Peru Development (CNPC) | Advised on land matters relating to the company’s Hydrocarbon Blocks VII/VI, located on the northern coast of Peru.
Olympic Peru INC. | Advised on regulatory matters relating to its exploration activities in Block XIII, located in northern Peru.
Enel Green Power | Assisted in obtaining the permits required to commence construction of the Ayununga hydroelectric project (20 MW), awarded during the fourth renewable energy auction conducted by OSINERGMIN (Supervisory Agency for Investment in Energy and Mining) (USD 65 million).
Colbun | Advised on the acquisition of the Fenix thermal power plant, one of the largest thermal power plants in Peru, with an installed capacity of 570 MW (USD 728 million).
Neoen S.A.S. | Advised on participation in the fourth RER auction conducted by OSINERGMIN, including review of the bidding rules, preparation of queries and observations, bid preparation, review of the power supply agreement, and submission of bids during the first and second rounds. The solar plant construction project is estimated at USD 75 million.
BP Exploration Operating Company Limited | Advised on the termination of six Technical Evaluation Agreements with Perupetro S.A.
Shell GNL | Advised on regulatory matters and interactions with various government authorities, as well as on relationships with local clients.
Tullow Oil | Advised on the termination of its offshore License Agreements for Blocks Z-64, Z-67, and Z-68 with the Peruvian government.
Pluspetrol Perú Corporation | Advised on regulatory and contractual matters relating to fuel commercialization and storage.
Perenco | Advised the French company on regulatory and contractual matters concerning Blocks 67 and 39, located in the Peruvian rainforest.
GASNORP | Advised PROMIGAS Colombia’s subsidiary throughout the land acquisition process for a 270 km gas pipeline forming part of the natural gas distribution concession in the Piura region, northern Peru.
COGA | Advised on the negotiation and execution of a major Gas Pipeline Maintenance Agreement with a consortium formed by Stork and Sicim for the operation and maintenance of the TGP gas pipeline; on the implementation of COVID-19 regulations for natural gas pipeline operations; and on various regulatory, commercial, and labor matters.

Memberships & Roles

Lima Bar Association (CAL)
Arequipa Bar Association (CAA)
Peruvian Institute of Mining, Oil and Energy Law
Foundation for Natural Resources and Energy Law (FNREL)
Association of International Energy Negotiators (AIEN)

Awards & Rankings

Chambers & Partners: Oil & Gas – Band 1 | Carlos Hamann: Band 1
The Legal 500: Oil & Gas – Tier 1 | Carlos Hamann: Leading Individual

Education

2024 – Diploma, Directors’ Specialization Program (PED 2024), PAD – School of Management, University of Piura.
2024 – Certificate in Financial Accounting, Harvard Business School Online.
2022 – Diploma, National Reality Program 2022, PAD – School of Management, University of Piura.
2014 – Diploma in Administrative Law, Universidad ESAN.
2005 – Master’s Degree, School of Advanced International Studies (SAIS), Johns Hopkins University.
2001 – Master of Laws (LL.M.), Universidad Carlos III, Madrid, Spain.
1997 – Law Degree, Pontifical Catholic University of Peru, Lima, Peru.

Practice Areas

sectors

Energy & Climate Change Oil & Gas Power

Insights by Carlos

See all Insights

Expert Guide International

CMS Expert Guide to consequential loss in the energy sector

18 Dec 2025 4 min read

Brochures Peru

Doing Business India – Peru

05 Sep 2025 1 min read

Publication International

CMS Energy Transition Report 2025

03 Jul 2025 3 min read

Event Peru

International Mining and Energy Law, Development, and Investment

02 Apr 2025