Mikhail Balonov retired from the Research Institute of Radiation Hygiene (RIRH), St. Petersburg, Russia (http://www.niirg.ru/ ). He has more than fifty years of work experience in the field of radiation protection of the public. This includes unique experience of population protection after the nuclear accidents at Chernobyl and Fukushima-1 NPPs. His recent job at RIRH (2007-2020) was the development and implementation of regulation for medical exposures. Seven years of work (2000-2006) at IAEA as Unit Head for Safety of Radioactive Discharges. Developed international safety standards and technical reports on control of environmental radioactivity, radionuclides in food and drinking water, etc. Twelve years (1988-2000) of leading the Department of Radioecology at RIRH following the Chernobyl accident. Experimental and theoretical work in the area of protection of humans against internal exposure with tritium and other radionuclides (1967-1986). Member of the ICRP Committee 2 (2001-2013), Scientific secretary of the UN Chernobyl Forum (2003-2005), UNSCEAR consultant since 2006 and up to now. Dr. Sc. in Radiobiology and Radiation Hygiene, Professor; PhD in Biophysics. M. Balonov graduated as M. S. in Nuclear Physics in 1967 from the Leningrad Polytechnic Institute.