 In 1988 he joined the faculty Robert E. Condon and Dr. Charles Aprahamian at the Medical College of Wisconsin and became a full Professor of Surgery.He developed one of the first US surgical critical care fellowship programs at the Medical College of Wisconsin in 1990 and became its first director.In 2000 Dr. Wittmann retired from the medical college but continued his work on staged abdominal repair and the hook and loop fastener temporary fascia prosthesis.