International Union of Operating Engineers Stationary Engineers Local 39 Pension Plan (IUOE Local 39 Fund) is a multi-employer defined benefit union pension fund based in Pleasanton, California. The plan was established in 1955 as a collective bargaining agreement between the union and various employers to provide retirement, death, and disability benefits for eligible participants. The plan is financed by employer contributions. The assets of the pension fund are managed by the board of trustees