Christian Freund has completed his Ph.D in the group of Tad Holak at the Max-Planck-Institute of Biochemistry in Martinsried/Germany. After two post-doc appointments in the labs of Andreas Plückthun (University of Zürich) and Gerhard Wagner/Ellis Reinherz (Harvard Medical School) he became a BMBF-Biofuture award funded independent group leader at the Leibniz-Institut für Molekulare Pharmakologie in Berlin. Since 2011 he is a full professor of Biochemistry at Freie Universität Berlin, heading the Laboratory of Protein Biochemistry. His main research interests are in the fields of antigen presentation by MHCII molecules and of scaffolding proteins that coordinate intracellular signaling pathways in T cells. Protein engineering and NMR spectroscopy techniques are instrumental for the biochemical and molecular immunology approaches used in his group to delineate the mechanisms underlying the complex cellular and organismic functions of adaptive immunity.