Joachim Mnich studied electrical engineering at the RWTH Aachen from 1977. Two years later he also began to study physics. In 1984 he worked as a graduate student at the PETRA storage ring at DESY (MARK J experiment) and in 1988 joined CERN (L3 experiment). In 1995 he qualified as a professor at the RWTH Aachen. After five years as a researcher at CERN, he moved back to RWTH Aachen University as a professor.

In 2005 he started a job as a senior scientist at DESY and professor of physics at the University of Hamburg. At DESY he coordinated among others the EU program EUDET and directed the CMS group, before he was appointed in 2009 as Director for Particle Physics and Astroparticle Physics to the DESY Board of Directors.

His scientific interests lie in the study of elementary particles and their properties, the planning and development of new detection devices, the physics analysis at the LHC (CMS experiment) and the preparation of a new electron-positron linear collider.

Joachim Mnich is a member of numerous national and international experts and advisory bodies.