John O’Hagan heads the Laser and Optical Radiation Dosimetry Group at PHE’s Centre for Radiation, Chemical and Environmental Hazards. The Group provides advice to government and others on the beneficial and harmful effects of optical radiation on people.

He’s also a visiting fellow at Loughborough University where joint laser safety courses are provided through collaboration that started in March 1990. He holds a number of honorary roles including Director of the International Commission on Illumination Division 6 “Photobiology and Photochemistry”, membership of the Scientific Expert Group of the International Commission on Non-Ionizing Radiation Protection and is Chairman of the British Standards committee “Optical Radiation Safety and Laser Equipment”.