He is a member of the Royal Swedish Academy of Sciences[1] and since 2004 serves as the secretary of the Nobel Committee for Physics.
[2] Bergström received his PhD 1981 from the Royal Institute of Technology, with a thesis by the title of ``Aspects of bound states in hadron physics".
After a postdoctoral fellowship at CERN, he was nominated docent in theoretical physics at the Royal Institute of Technology.
Together with Paolo Gondolo, Joakim Edsjö, Piero Ullio, Mia Schelke and Edward Baltz, he developed DarkSUSY, a famous numerical package for neutralino dark matter calculations.
Bergström has also contributed importantly to the field of supersymmetry, particularly studying supersymmetric dark matter candidates.