Our References

At Mazars, we combine international business and industry knowledge with unique insights into existing and emerging trends to offer our clients in the Energy industry preeminent services including, audit, financial advisory services, consulting, tax and regulatory and compliance advice.

Renewable energy

Supporting the development of Swisspower Renewables 

Swisspower Renewables is a cooperation created between several  Swiss industrial groups. Its objective is to set up a portfolio with an annual capacity of approximately 700 million kWh stemming from renewable energies in five years. Mazars has supported Swisspower in identifying and approaching potential targets in Europe, as well as in the complex analysis of various projects. We brought Swisspower Renewables the know-how of our experts in Corporate Finance, modelling and due diligence.

Statutory auditor of Solaria Energia 

Founded in 2002, Solaria Energia y Medio Ambiente is the only solar company listed on the Spanish stock exchange. It manufactures photovoltaic modules and cells in its two production facilities located in Spain, with a production capacity of 250 MW. Solaria is made up of 44 subsidiaries which are present in Germany, France, Italy, Latin America and Spain.


Statutory auditor of Areva

Areva, which is mainly known for nuclear power, is a French public multinational industrial conglomerate created in 2001. Areva also has interests in other energy projects.  Mazars was the Statutory Auditor of the holding CEAI from 1989 and has been appointed for Areva Group since its establishment in 2001. 

Support surveillance of compliance by ANEEL

The National Electric Energy Agency (ANEEL) is headquartered in the Federal District, in order to regulate and supervise the production, transmission and sale of electricity in accordance with the policies and guidelines of the federal government.

Reviewer of COPEL's accounts

The Electricity Transmission Company Paulista - CTEEP operates in the business of electricity transmission in Brazil , and is considered one of the leading private concessionaires of the sector in the country.

Oil & Gas

Anti-trust assignment for Eni group

Eni is an oil & gas group operating in 79 countries. Following a decision by the European Commission, Eni  was required  to appoint  an independent monitoring trustee to supervise the fulfillment of its divestment commitments in relation to the three natural gas transmission pipelines in Europe. Mazars acted as the EC’s Monitoring Trustee in order to supervise the disposal process and preserve the market value of the Divestment Businesses. The ability to effectively coordinate the disposal process with the requirements of the Anti-trust Authorities demonstrated Mazars’ leadership in accomplishing Anti-trust assignments.

Statutory auditor of CGG group

CGG is a French-based geophysical services company, primarily involved in oil exploration. Mazars has been the statutory auditor of the group since 2003. Our teams are involved in the Equipment Division and all related entities. Our involvement covers the UK, Switzerland, Netherlands and as of 2013, Singapore, Malaysia and China.

Oil cost audit assignment for the Government of the Republic of Niger 

In 2011, the Republic of Niger became  an official  oil producer with the opening of the country's first refinery in Zinder. Mazars has been appointed independent auditor by the Government of the Republic of Niger to perform a cost oil audit assignment in order to verify compliance with production sharing agreements defined in accordance with a private operator. Mazars was also mandated to assess and perform IT system and procedures control.

Review DIPJ and transfer price for Exterran

Exterran is a leading products and natural gas compression services - as well as a provider of oil production equipment solutions, gas processing, water treatment and produced spare parts and services.


ICC Arbitration - Iron Ore Mining

Mazars was appointed to provide advice to an African government following a dispute with a South African mining company. This was the result of the termination of a concession agreement regarding a 'greenfield' project. Mazars conducted a critical review of the financial model as well as a calculation of cash flow available to investors after payment of all expenses, taxes and debt services.

Accountability Vale S.A

Vale is one of the largest mining companies in the world. Brazilian , created for the exploitation of iron mines in Itabira region, in the state of Minas Gerais in 1942 in Getúlio Vargas government, Vale is now a private company, publicly traded, headquartered in Rio de Janeiro.

Accounting Reconciliation Taboca Mining

The largest producer of refined tin in Brazil. The Mining Taboca was founded in 1969 and operates in the mining and metallurgy of tin and industrial minerals.