[2] In 1968 he joined Klaus H. Hofmann's Group at the University of Pittsburgh to work on chemical synthesis of the peptidic adrenocorticotropic hormone and its derivatives.

1975 he became a senior research fellow in the Department of Peptide Chemistry at the Max Planck Institute for Biochemistry (MPIB) in Martinsried headed by Erich Wünsch [de].

[3] Moroder's work at the Max Planck Institute for Biochemistry in Martinsried was initially focused on the gastrin and cholecystokinin system, revealing the mechanism for the membrane-bound pathway of hormone recognition by the receptors.

For example, he addressed fundamental questions of the kinetics of protein folding[9] and actively contributed to the design and synthesis of enzyme inhibitors involved in various diseases, including cancer.

As a boy he became fascinated by natural science while accompanying his father Heinrich on mineralogical, paleontological and archaeological excursions in the mountain world of his homeland with discoveries of various fossiles that are exemplary shown in the Museum Gherdeina.