Nicolas advises U.S. and international companies in all kinds of business and cross border transactions regarding natural resources. He assisted several companies involved in the different E&P rounds for exploration and production of hydrocarbons in Mexico, as conducted by the National Hydrocarbons Commission (CNH) and negotiations of joint ventures with Pemex affiliates. He has also been active in downstream regulatory issues (storage, transportation, trading, and import of different fuels) before the Energy Regulatory Commission (CRE) and the Ministry of Energy (Sener).

Nicolas has also served as a key advisor in public bids by the Federal Electricity Commission (CFE), the development of natural gas transportation pipelines, public auctions of CENACE in connection with the new electricity market, and the representation of clients trading gas and power and large off-takers in electricity supply optimization alternatives. 

Active in the energy community, Nicolas has chaired the Energy Committees of the National Association of Corporate Counsels (ANADE) and the Mexican Bar Association (BMA). He teaches at the Energy Law Postgraduate Program of the Escuela Libre de Derecho in Mexico City and has lectured at several universities, including the University of Texas at Austin, Georgetown University, Tulane University, and ITAM University. He has previously served as professor of energy law at the Universidad Iberoamericana. Nicolas is also a frequent speaker and author on international energy matters.