The Portsmouth Naval Shipyard plans to hire more than 700 new employees next year.
The shipyard, based in Kittery, Maine, is recruiting applicants for a number of positions, including engineers, technicians and shipfitters.
Shipyard commander Capt. William Greene says the expansion is needed to keep up with the increased workload of overhauling nuclear submarines, and to make up for about 200 workers who are retiring or leaving for other jobs.
Once the positions are filled, the shipyard's workforce will grow to more than 5,000 civilian employees.