· Non-Executive Director, Tokamak Energy2022–
· Founder, Winton Group1997–
· Head of Man Quantitative Research, Man Group (formerly ED & F Man)1994–1996
· Co-founder, Adam, Harding & Lueck (AHL)1987–1994
· Futures Trader, Sabre Fund Management1985–1987
· Trader, Johnson Matthey & Wallace1984–1985
· Trainee, Wood Mackenzie1982–1984
· Graduate Student, University of Cambridge1979–1982