The Mechanical Contractors Association of New York, Inc. (MCA) is an organization formed to foster the Mechanical and Sprinkler Contracting Industry in New York City and Long Island. MCA is designed to promote your welfare, as a mechanical contractor, and the development of the heating, piping, air conditioning and fire suppression industry. MCA is a business association concerned with your business! Since 1885, MCA has provided a place for contractors to come for a number of reasons.