Marcos serves as the Principal Deputy Director at the U.S. Department of Energy’s (DOE's) Office of Technology Transitions (DOE). In conjunction with the Director, Marcos works with program offices within DOE as well as with the national labs to identify and increase awareness of partnership opportunities for the private sector to access and leverage DOE's portfolio of pioneering R&D, leading scientists and experts, and world-class facilities.

Prior to joining OTT in November 2017, he served in roles of increasing responsibility in the Office of the Under Secretary for Science and Energy (now Under Secretary for Science), starting in 2013 as a budget advisor and departing as the Deputy Chief of Staff. During his time with the Under Secretary's Office, Marcos led an effort to stand up six interdisciplinary crosscutting teams covering topics ranging from the energy-water nexus to grid modernization with a budget footprint of nearly $1 billion of DOE’s R&D portfolio. In his capacity with the Under Secretary, Marcos also helped to stand up both the Office of Technology Transitions and the Energy Investor Center. Marcos has also served as a voting member of the Project Review Committee tasked with reviewing all new loan guarantees recommended for approval by the DOE Loan Programs Office.

Over the course of his career, Marcos has worked in microfinance in Peru and Bolivia, served as an energy and trade analyst with the Council of the Americas in New York City, and survived a bout of the entrepreneurial bug while living in Lima, Peru for a year. He also spent some time in the mortgage finance industry in 2008.

Marcos holds a bachelor’s degree in economics from Princeton University and a master’s degree in international affairs with a focus on international finance from The Fletcher School at Tufts University.