With nearly 600,000 active and retired members, the IAM is one of the largest and most diverse labor unions in North America. From Boeing and Lockheed Martin to United Airlines and Harley-Davidson, you will find IAM members across all walks of life. TWI works with IAM, local 1414 and the City and County of San Francisco to recruit for IAM’s pre-apprenticeship program which serves as a pipeline for MUNI auto mechanics.