From Starfleet Commander
Labor is a Starfleet Hired Guns territory. The Labor Territory allows a player to build the Foundry and Construction buildings. The Hired Guns Foundry reduces the time for building buildings (doubles the effective Capitol level), while Construction reduces build time of ships and defenses (effectively doubling the Shipyard).
Before Construction can be built, Production Link Level 7 must be built. Level 11 Production Link is required for Foundry. (Additional techs are also required.)