Cris Millennium has been working in the 'CBRN' field since 2003. He served in the national CBRN unit of the National Gendarmerie, where he particularly contributed to the development of the scientific police deployed in contaminated environments. He acted as the head of the CBRN cell of the prestigious counterterrorism unit GIGN for six years. Since 2013, he has been CBRN advisor to a certain foreign government.