Here you'll find links to the many Union Building Trades available to BPS graduates. Insulators and Allied Workers Boilermakers Bricklayers Painters and Allied Trades Iron Workers Electricians Plasterers’ and Cement Masons’ Roofers, Waterproofers, and Allied Workers Sheet Metal, Air, Rail, Transportaion Helmets to Hardhats Plumbers, Pipe-fitters, and Service Techs Carpenters Operating Engineers Laborers’ Teamsters Elevators Contructors