 He was a Research Associate at Stanford Linear Accelerator Center 1969–74.Returning to Oxford he was a research officer (1974–78), teaching lecturer at Christ Church (1976–78), Senior Research Fellow at Merton (1977–79), and Fellow and Tutor at Balliol and University Lecturer in Physics (1979–90).He was appointed Reader in Experimental Physics in 1990 and Professor of Experimental Physics in 1991.