J.F. Lehman & Company, a middle-market private equity firm focused on the maritime, defense and aerospace sectors, announced today that it has sold its portfolio company, Northeast Ship Repair, Inc. to affiliates of Plexus Capital and NewSpring Capital. The sale of Northeast Ship Repair follows J.F. Lehman's recent sales of ACR Electronics and Drew Marine, both announced on November 19. Northeast Ship Repair is a provider of large vessel maintenance, repair and overhaul services for the U.S. Government noncombatant fleet and commercial customers.