Jonathan Vivian Rosenhead (born 21 September 1938) is a British mathematician, operational researcher and Labour Party activist.
Jonathan Rosenhead is the son of mathematician Louis Rosenhead. He studied at the University of Cambridge (St. John's College) where he received a B.A. degree in mathematics in 1959. He continued his studies at University College London where he received an M.Sc. degree in statistics in 1961, and an M.A. from Cambridge in 1963. He worked as an operational researcher at United Steel Companies in Sheffield in 1961-63 and at Science in General Management Ltd. (SIGMA) in Croydon in 1963-66 before returning to the academic world.
Rosenhead spent 1966-67 at the Wharton School of the University of Pennsylvania and its Management Science Centre, where Russell L. Ackoff was professor. In 1967 he joined the London School of Economics as a lecturer in operational research. He became a senior lecturer in 1981 and professor of operational research in 1987. He retired in 2003.
Within operational research (OR), Rosenhead is primarily associated with the development of "soft OR" from the late 1970s, which resulted in the development of a number. He was the editor of the first book to gather a number of problem structuring methods within one volume, Rational analysis for a problematic world, published in 1989.
He was president of the Operational Research Society in 1986-87.
Rosenhead was a Labour Party candidate for Parliament in the 1966 election. He was active in the British Society for Social Responsibility in Science during a 20-year period, which included a period as chair of the society. His political activities has included being chairman of the British Committee for the Universities of Palestine (BRICUP) and being information officer for Jewish Voice for Labour.