Mark B. Fuller

Mark Benton Fuller (born September 19, 1953) is an American business strategist, investor, academic, and author. He is the founding chairman of Rosc Global, a Boston- and London-based family office with a venture capital arm.

Early life Mark B. Fuller is the son of Stephen H. Fuller, a former professor and associate dean at the Harvard Business School.

He earned a B.A. in History from Harvard College (Phi Beta Kappa, magna cum laude) and both an M.B.A. and J.D. from Harvard University, graduating with distinction from each program.

Academic career Fuller began his career as an Assistant Professor of Business Administration at Harvard Business School, teaching strategy, business–government relations, and industry analysis. He contributed to the Harvard Program on Negotiation and taught within Harvard’s Faculty of Arts and Sciences. He served as its chairman and chief executive officer from 1983 to 2011. His work included projects in post-conflict and transitional environments such as Libya, where Monitor’s role was subject to public controversy; U.S. Department of Justice investigations concluded without action against the firm.

In parallel with consulting, Fuller sponsored and advised private equity funds, venture capital funds, and special purpose vehicles in the U.S., Brazil, South Africa, and other markets. He has served on the boards or advisory councils of investment firms including Sandaire and Roundtable Investment Partners.

As of 2025, He is the founding chairman of Rosc Global, a Boston- and London-based family office with a venture capital arm, Rosc I, co-founded with his son Alexander M. Fuller. Rosc I invests at the intersection of national competitiveness, structural dynamics, and frontier innovation.

As of 2025, Fuller continues to serve as Chairman and CEO of Rosc Global and Rosc Global Investments, where he leads investment strategy and advisory work. Under his direction, Rosc positions itself as a “family office turned venture capital” entity, focusing on early-stage enterprises guided by comprehensive risk analysis, ecosystem-level thinking, and structural trends.

He is also a founding member of the World Economic Forum.

In recent years, he has joined advisory boards such as Ergo, a global intelligence and advisory firm.