[2][3] From 2013 to 2017, he served as Spokesperson (scientific head) of the ATLAS experiment at the Large Hadron Collider at CERN.

He went on to study for a PhD in Particle Physics at the University of Birmingham, which he was awarded in 1989[5][7] for work on the UA1 experiment, searching for the top quark.

[8][9][10][11][12][13] He is regarded as a leader in the experimental elucidation of electroweak symmetry-breaking, culminating in the observation and first characterisation of a Higgs boson, at the Large Hadron Collider (LHC).

[14] Later he led the measurements which directly demonstrated the gauge structure of the electroweak sector of the Standard Model.

[14] During the construction of the ATLAS experiment, he worked on hybrid readout circuits for the silicon strip sensors of the Semiconductor Tracker (SCT) detector and on the first-level calorimeter trigger system.