President, Memorial Health Hospital Group and President & CEO, Springfield Memorial Hospital
Dr. Callahan earned his doctoral degree in clinical psychology at the University of Nebraska-Lincoln in 1991 and his MBA at the University of Illinois-Springfield in 2004. A Fellow of the American Psychological Association and the American College of Healthcare Executives, he is board certified in Rehabilitation Psychology by the American Board of Professional Psychology and is a Certified Lean Six Sigma Black Belt.
Dr. Callahan has published more than 50 professional articles in the areas of brain injury rehabilitation, neuropsychology, emergency/trauma medicine, healthcare process improvement and outcomes measurement. He previously served on the editorial boards of Rehabilitation Psychology and The Journal of Head Trauma Rehabilitation, and is a past president of the American Psychological Association’s Division of Rehabilitation Psychology. Callahan served a six-year term on the United Way of Central Illinois Board of Directors, including as board chair in 2012-2013. He was a 2018 Baldrige Executive Fellow through the National Institute of Standards and Technology in Washington, D.C., and is a past trustee of the Board of the Illinois Performance Excellence Program. He is a Baldrige Communities of Excellence 2026 examiner.
Callahan has been employed by Memorial Health, serving in a variety of clinical and administrative roles, since 1991. He became the organization’s first chief quality officer in 2013 and advanced to chief operating officer in 2014. In June 2019, Callahan became president of the Memorial Health Hospital Group and president and chief executive officer of its flagship tertiary academic medical center, Springfield Memorial Hospital. He was recently honored with the 2022 American College of Healthcare Executives Senior Level Healthcare Executive Regents Award, and currently is serving a three-year term on the Board of Professional Affairs of the American Psychological Association.