Lars Bergström has a long-standing interest in the dark matter problem, starting in the mid-80s with the first supersymmetric WIMP models. He has combined theory with proposing many methods of detection, like AMANDA for neutrino detection at the South Pole (superseded later by IceCube) and the Fermi space telescope for gamma rays. His background is in theoretical physics - he was a CERN Fellow, studying mainly rare decays of elementary particles. Lately, his interests are still focused on dark matter, where he has contributed to the DarkSUSY computer package. He is currently studying axion phenomenology as well as primordial black holes as dark matter, besides following new gamma-ray telescope projects like Gamma-400, DAMPE, and HERD.