Mark leads the firm’s Brazil-focused research and advises clients on energy, trade, and public policy dynamics in Latin America.

Mark has guided clients through evolving political landscapes and engagement strategies for foreign investors, authoring ground-breaking reports on President Bolsonaro’s inner circle, Petrobras’s decision-making structure, and the influence of second-tier figures in Brazil’s economy. He has built a vast network across the Brazilian government, civil society, and the private sector.

Prior to Horizon Engage, Mark served as international advisor to the Brazilian Cotton Producers’ Association, Director of the Brazil Initiative and research professor at the Elliott School of International Affairs at George Washington University, and international advisor to Public Services International. He currently serves as a Senior Fellow and adjunct faculty member at George Mason University’s Schar School of Policy and Government and is Deputy Course Chair at the US Foreign Service Institute’s Division of Economic and Commercial Studies.

Mark frequently speaks on Brazil–US relations, energy transition, and trade policy. His commentary and writing have appeared in Brazzil, American Diplomacy, the Latin America Advisor, LSE Latin America and Caribbean Blog, and Boletim Meridiano 47. He is the author of The Political Economy of Brazil’s WTO Case Against the United States: Inside the Cotton Dispute (Palgrave Macmillan, 2023).

He received a PhD in Political Science and an MA in Latin American Studies from the University of Arizona, and a BA in Liberal Arts from The Evergreen State College.