Substantial experience in the Brazilian power sector and related regulatory affairs, from generation, in its various sources, through transmission to distribution and trading of energy. In this area, advises companies, free and special power consumers, power traders and other agents of the power sector in numerous activities, such as the relationship with the Ministério de Minas e Energia (“MME” – the Ministry of Mines and Energy) and the Agência Nacional de Energia Elétrica ("ANEEL” - the Regulatory National Agency of Electric Energy), regulatory consulting and also analysis of a diversity of contracts, regulated and non-regulated, such as Power Purchase Agreements ("PPAs") and Distribution/Transmission Line Use and Connection Contracts, and others. Acting in other several infrastructure areas, working with all infrastructure related contracts, such as EPC Contracts (Engineering, Procurement and Construction), turn-keys, Built to Suit, BOT (Build, Operate and Transfer) contracts, as well as other different arrangements. Marvin advises energy companies in the industry also in the readjustment process and tariff review.Representative Experience Handling defenses of ANEEL assessments resulting in the reduction of millions in penalties.  Representing utilities in corporate restructuring and segregation of their activities. Consulting in new power generation business and structuring of impressive projects in the electric energy sector. Advising a power sector association on the drafting process of a regulation, which resulted in the resolution of Brazilian Electric Energy Agency (“ANEEL”) which provides for the general conditions for power supply in Brazil. Representing an American company in the implementation of its business in Brazil in microgeneration and minigeneration, from solar power. Professor of several Energy Law courses (FGV, ESA / RJ, EMERJ, among others).  Several conferred lectures and published articles.

Research for the development and updating of the teaching material of graduate program ( LLM) at the Fundação Getulio Vargas - FGV LAW PROGRAM.

Coordination of strategic litigation contracts in lawsuits involving regulatory agencies.Legal and regulatory consulting to major companies in the electricity sector, in distribution, trading, generation and transmission of energy.Legal opinions on legal and regulatory issues involving the energy sector .Analysis of contracts in general and regulated .Structuring of M&A transactions in the energy sector.Advising energy sector companies in the industry also in the readjustment process and tariff review, and in administrative and judicial proceedings of regulatory matters. Constant relationship with ANEEL, CCEE, ONS, among others.Study and discussion of current issues of administrative law, focusing on the regulation in the energy sector, with a profound bow to the preparation of texts, articles and legal opinions.

Legal and regulatory support for generation, commercialization and distribution of electricity energy, as well as performance in administrative litigation. Consulting in Environmental Law and Contracts.