PSSA's Core Purpose To Share Knowledge and Learn from Our Members The PSSA Members work together to promote worker safety and environmental stewardship here in the great Pacific North West. Sharing knowledge and best practices that can reduce shipyard work related injuries, that allows the craftsmen and women we employ to return home each day healthy and uninjured. Acting as guardians and stewards of the land, air and water we share. We strive to be strong advocates of utilizing methods and processes that protect our precious Puget Sound environment.