Jasper Kirkby is an experimental particle physicist at CERN, Switzerland. After completing his degrees at Oxford and London, he spent 12 years at Stanford before joining CERN in 1984. He has built detectors and carried out experiments at accelerators in the United States (BNL AGS, SLAC Linac, SPEAR, and PEP) and Europe (CERN PS, LEP, PSI and RAL). He originated the idea for a new accelerator known as the Tau-Charm Factory, which eventually led to BEPCII in Beijing. He has conceived of and led several large experiments at accelerators: the DELCO detector at SPEAR; the DELCO detector at PEP; the FAST experiment at PSI; and the CLOUD experiment at CERN.