Since our incorporation in 1971, SMACNA of Long Island has remained committed to providing educational opportunities and technical guidance for our members and our industry partners. SMACNA of Long Island contractors are knowledgeable, well informed and dedicated to providing the highest quality of construction for our communities. SMACNA OF LONG ISLAND is an association of locally based, sheet metal, HVAC and testing and balancing contractors employing over 500 union workers enrolled in the Sheet Metal Workers International. We are committed to providing the highest quality of construction for our communities, while providing the highest quality of employment for our workers.