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

SMART is a labor union that represents workers employed in the sheet metal, air conditioning, rail, and transportation industries. Its primary function is to negotiate collective bargaining agreements on behalf of its members and to provide workplace representation in disputes with employers. The union also administers training and apprenticeship programs designed to upgrade skills and ensure safety in the trades it serves. Members are employed across a range of settings including manufacturing plants, construction sites, and public transit systems. In addition to representation, SMART engages in legislative advocacy aimed at protecting workers' rights and improving industry standards.

The organization’s distinguishing attribute is its focus on the specific trades of sheet metal, air, rail, and transportation, which allows it to develop targeted training resources and safety initiatives. Through its affiliates, SMART delivers services such as grievance handling, safety training, and career development support to its members. In September 2023, SMART experienced an external system breach that exposed personal information including names and Social Security Numbers of a significant number of individuals. Following the incident, the organization offered affected persons identity theft protection services, including credit monitoring and a reimbursement policy. The breach highlighted the importance of data protection measures for organizations that maintain sensitive member information.