Facilities Management Mark E Hamister is Chairman and CEO of Hamister Group LLC which is a recognized leader in healthcare and hotel management, focusing on providing exceptional service and a reputation for delivering superior management results. 10 Lafayette Square, Suite 1900, NY 14203 / 716-839-4000/[email protected] To Add your Family Office Blue Pages Listing you must be a Charter Member. Login to your Charter Membership area to submit your listing details now or become a charter member today. Return to Family Office Blue Pages Directory