is a partner at García Sayán Abogados, and co-head of the Natural Resources Department. His practice focuses on oil and gas legislation, in addition to labour and immigration law. He has notable experience in the incorporation of oil and gas companies, and in negotiation of licence contracts with the Peruvian government, also providing legal advice to oil and gas companies on their regular operations. He is currently a board member and chair of the Hydrocarbons Legal Affairs Committee of the National Mining, Oil and Energy Society, as well as a member of the Association of International Petroleum Negotiators (AIPN). Mr Varillas has been Professor of the Environmental and Natural Resources Law Diploma at Pontificia Universidad Católica del Perú School of Law since 2009.