John Callahan, based in Hollis, NH, US, is currently a Chairman of the Board of Trustees at YMCA of Greater Nashua, bringing experience from previous roles at Home Health & Hospice Care, Nashua Reflection Garden and Greater Nashua YMCA. John Callahan holds a 1978 - 1979 Certificate in Business Management @ MIT Sloan School of Management. With a robust skill set that includes Public Relations, Strategic Planning, Public Speaking, Event Planning, Board Development and more, John Callahan contributes valuable insights to the industry. John Callahan has 4 emails and 2 mobile phone numbers on RocketReach.