Prior to relocating to Milwaukee, he was Associate Professor of Neurosurgery, Rush Presbyterian St. Luke’s Medical College, Associate Neurosurgeon Rush Presbyterian St. Luke’s Medical Center and director of the Chicago Institute of Neurosurgery and Neuroresearch Neurovascular Surgery Center. He came to the Institute in 1990 from the Johns Hopkins School of Medicine, Baltimore, Maryland, where he served as an assistant professor of neurosurgery and honed his expertise in the treatment of cerebrovascular disorders. Prior to his work at Johns Hopkins, Dr. Heffez held a Fogarty Research Fellowship at the National Institute of Neurological and Communicative Disorders and Stroke.