Harry Cliff is an Ernest Rutherford Fellow and Public Physicist at the University of Cambridge. He is a particle physicist at the Cavendish Laboratory and a member of the LHCb Experiment at the Large Hadron Collider at CERN. His research focuses on the rare decays of beauty quarks, which could provide evidence of new phenomena beyond the Standard Model. He serves as the convener of the Rare Decays Working Group at LHCb.

Beyond his research, Cliff is highly engaged in science communication.