[1] Rammensee has contributed essentially to the research fields of MHC biology and tumor immunology and to the development of cancer immunotherapies.

Two years later Rammensee returned to Max Planck Institute for Biology as a group leader at the department of immunogenetics.

1993 he became head of department at the Tumor-Virus-Immunology Section of the German Cancer Research Center, Heidelberg, Germany.

He has been a Full Professor at the University of Tübingen and Chair of the Department of Immunology at the Institute for Cell Biology since 1996.

He has contributed to genetics and immune regulation as well as to the understanding of minor H antigens, T cells and the major histocompatibility complex (MHC).