John K. Castle, the Chairman of Castle Connolly Medical Ltd., has spent much of the last three decades involved with healthcare institutions and issues. Mr. Castle served as Chairman of the Board of New York Medical College for eleven years, an institution where he served on the Board of Trustees for twenty-two years.

Mr. Castle has been extensively involved in other healthcare and voluntary activities as well. He served for five years as a commissioner and officer of the Joint Commission formerly known as (JCAHO), the body which accredits most public and private hospitals throughout the United States. Mr. Castle has also served as a trustee of five different hospitals in the metropolitan New York region, including NewYorkPresbyterianHospital, where he continues to serve.

Mr. Castle has also served as the Chairman of the Columbia Presbyterian Science Advisory Council and as a Director of the Whitehead Institute for Biomedical Research. He is a Fellow of New York Academy of Medicine and has served as a Trustee of the Academy.  He was Chairman of the United Hospital Fund of New York’s Capital Campaign and continues as Director Emeritus of the United Hospital Fund. He is a Life Member of the MIT Corporation, the governing body of the Massachusetts Institute of Technology.