Complex sentence: Returning to Wisconsin, with a joint appointment in the departments of Nuclear Engineering and Physics--and, later, also Medical Physics, he concentrated on the medical application of neutrons in cancer therapy until his retirement in 1986.
Split into simpler sentences: Returning to Wisconsin, with a joint appointment in the departments of Nuclear Engineering and Physics--and, later, also Medical Physics. He concentrated on the medical application of neutrons in cancer therapy until his retirement in 1986.