Local 4, a Local affiliate of the International Federation of Professional and Technical Engineers (IFPTE), is the largest labor union at Portsmouth Naval Shipyard (PNS) in Kittery, Maine representing nearly 2,000 federal service employees. Since our original charter in 1918 we have continuously and effectively represented PNS labor, defended against attacks on worker rights, and strive to protect and improve working conditions for the benefit of PNS professionals and the overall mission of PNS. We invite you to visit your Union Hall anytime for guidance, help, advice, information, or just to say hello. Your Union Hall, located on the 1st floor of Building M3, is also home for your Union elected officers who are here to serve and represent you