Peter Townsend is an experimental scientist who has worked in academia, national laboratories and industry in 9 countries, gaining expertise on a diverse range of topics including solid state physics of imperfections, ion implantation, luminescence, glass, optoelectronics, photonics, archaeology, cancer detection, and photon detectors. He has published over 550 research articles and 8 books and holds honorary doctorates from the Universidad Autónoma de Madrid and The Bulgarian Academy of Sciences.