Local 3357 started with organizing meetings in Western New York in Fall 1985. The first Collective Bargaining Agreement was signed in March 1987 and the first official Executive Board meeting was held in July 1987.
The Local expanded from just the Eastern Region of the Plan in 1986 to the West in 1986, Ohio in 1987, and merged with the Indiana/Kentucky Local 2441 in 2000.

2008 bargaining resulted in the Local's 7th CBA.

The original charter (below) is dated 9-11-1986 although the group existed informally in 1985.