Dr Blum is working the in the field of dection, analytical identification, countermeasures, decontamination and mitigation of effects of chemical and biological warfare agents with more than 20 years experience. From 2012 to 2019 he worked in the laboratory of the Organisation for the Prohibition of chemical Weapons (OPCW) where he was Head of the OPCW Laboratory from 2017 to 2019. In 2018 he was team leader for the OPCW’s mission to Salisbury and Amesbury following the assassination attempt on Sergei Skripal and his daughter Yulia. Dr Blum hold the rank of Lieutenant Colonel in the German Armed Forcers Reserve (NBC troops) currently assigned to the Bundeswehr Verification Center, department for global arms control and non-proliferation.