International Association of Sheet Metal, Air, Rail and Transportation Workers

The International Association of Sheet Metal, Air, Rail, and Transportation Workers (SMART) is a North American labor union headquartered in Washington, DC, which was chartered by the AFL–CIO in 2013. The product of a merger between the Sheet Metal Workers’ International Association (SMWIA) and the United Transportation Union (UTU), SMART represents over 230,000 sheet metal workers, service technicians, bus operators, engineers, conductors, sign workers, welders, and production employees, among others, throughout the United States, Puerto Rico, and Canada.

The Transportation Division (which has offices in Washington, DC, and North Olmsted, Ohio) represents employees on Class I railroad, Amtrak, and regional and short line railroads; bus and mass transit employees on some 45 transit systems; and airline pilots, flight attendants, dispatchers and other airport personnel. The Division's 500 local unions organize conductors, brakemen, switch men, ground service personnel, locomotive engineers, hostlers, and railroad yard masters, as well as bus drivers and mechanics.

Members of SMART's Sheet Metal Division design, manufacture, and install their own products. Employed in a variety of occupations – from architectural sheet metal work, to fabricating, installing, and servicing HVAC systems, to shipbuilding and railroad work.