Dr D’Agostino served as Chair, Dept of Psychiatry, Alexian Bros Medical Center, in Elk Grove Village, Illinois from 1979 to 1999 and CMO at the Alexian Brothers Behavioral Health Hospital in Hoffman Estates, Illinois from 1999 to 2011. He received his medical degree from the University of Illinois College of Medicine, Interned at the Los Angeles County General Hospital and completed residencies in General and Child Psychiatry at the University of Illinois,Chicago (UIC), the University of California, Los Angeles(UCLA), and The University of Wisconsin,Madison.
He served as an examiner for the Hospital Licensing Division of the Illinois Dept of Public Health from 1978-1986. He was President, Illinois Psychiatric Society in 1986-87 and served on the Health Insurance and Ethics committees for much of 2 decades. At the national level he was an Illinois delegate on the Assembly of the American Psychiatric Association from 1996 to 2002 where he also served as Vice Chair of its Managed Care Committee and is a Distinguished Fellow of the American Psychiatric Association. He has practiced Psychiatry at Alexian Brothers Hospitals for 40 years.