St. Catherine of Siena Hospital, affiliated with Catholic Health Services of Long Island, is located in Smithtown, NY on a beautiful 110-acre campus that includes a 290-bed community hospital, a 240-bed nursing and rehabilitation facility, and a 60,000 sq. The Maintenance Mechanic II Performs a wide variety of functions related to plumbing, heating, medical gases operation, maintenance and repair of hospital moveable equipment, and other building maintenance as required.