He joined Kenneth Crowe's group at Berkeley in 1961, using their 4.67m (184 inch) synchrocyclotron and working on a bent-crystal spectrometer for more precise particle mass measurement. In 1963, he joined the inchoative Rutherford Appleton Laboratory (RAL) structures, with their 7GeV Nimrod proton synchrotron and eventually became the RAL's Chief Principal Scientific Officer. There, he and others confirmed charge-parity violation in neutral kaon decay. In 1964, the RAL began a two-decade collaboration with Peter Kalmus 's group at Queen Mary University of London (QMUL), as well as with groups from Harwell and the University of Bergen amongst others. Experiments were carried out on various weak and strong interactions in the UK and low-energy antiproton - proton experiments at CERN. In 1974, he became the chair of the Nimrod coordinating team, in 1975, the chair of the CERN Electronic Experiments Committee and in 1976 he joined the evaluation committee of Canada's national particle accelerator, TRIUMF.