Engineers in this organization are responsible for a diverse array of engineered systems and hardware on the COLUMBIA Class submarine including hull and external structures, Common Missile Compartment (CMC) and forward end internal structures, fluid systems (seawater, freshwater, HVAC, hydraulics, and air systems), and mechanical systems (weapons handling, weapons launch, steering and diving systems, and valves). Using a design-build-sustain approach, engineers work in a team environment interfacing with designers, other engineering disciplines, operations, planning, procurement and testing organizations within the shipyard, as well as the NAVY and their local representative SUPSHIP.