Sailors' Union of the Pacific

The Sailors' Union of the Pacific (SUP) operates its primary regional administrative footprint out of its historic headquarters building in San Francisco, California, where its primary operation centers on providing collective bargaining, job placement, and professional advocacy for unlicensed mariners working aboard United States-flagged merchant vessels. Founded in San Francisco in 1885, the SUP is one of the oldest and most influential maritime labor unions in the nation, functioning as an autonomous affiliate of the Seafarers International Union (SIU).