Board and Staff


John L. Sieber


John graduated from Penn State University and earned a commission as a pilot in the U.S. Air Force, serving for 3 years. After nine years in significant corporate positions he…


John S. Xenos, MD

Chair of the Board

Dr. Xenos is a graduate of the United States Military Academy at West Point. Dr. Xenos earned his medical degree from the Georgetown University School of Medicine in Washington, D.C…


Stephen J. Schaefer


Steve joined HealthSouth in December 2008. He has more than 20 years of leadership experience in the healthcare field. Under his leadership, the hospital has built upon its community reputation…


Cassandra O’Neill

Executive Director
[email protected]

Cassandra has 30 years of nonprofit and for profit leadership experience. In addition, she is a Pilates Instructor and specializes in helping people recover from chronic pain.


Ryan Carr, MD

Colorado Orthopaedic Research Institute is pleased to welcome our 2019 Adult Hip/Knee Reconstruction Fellow, Dr. Ryan Carr…