Ecuadorian attorney with 17 years of experience in energy and extractive industries sector. Master of Laws by University of Texas at Austin, where he attended with the support of a Fulbright scholarship. He has worked with clients and employers including governments, private corporations, international organizations, academia and NGOs in administrative law, energy law and infrastructure law deals and international litigation. Regional experience in Africa, the Middle East, Asia and Latin America.

As General Legal Counsel of the Organization of the Petroleum Exporting Countries (OPEC) since 2018, Sempertegui leads the efforts of the organization to support their member countries in energy related policy and legal areas. Given the importance of the energy transition for resource-rich countries, the OPEC Legal Office has focused its work in sharing information, generating knowledge and providing professional support in this topic to member countries, other countries in the OPEC+ group and oil producing countries in general. His work also includes the creation of partnerships with relevant stakeholders to increase the success of the implementation of a fair, sustainable energy transition, which includes tackling issues such as economic diversification, energy access and energy poverty.