The Free Dac Volunteers Engineering Corps, also known as Quarren Free Dac Volunteers Engineering Corps or QFD, was a starship manufacturer active during the Clone Wars. They were most notoriously known for producing the Providence-class dreadnought. The QFD was primarily comprised of Quarrens, a species native to the planet Dac, who had allied themselves with the Confederacy of Independent Systems. They had a partnership with Pammant Docks, and factories located on the planet of the same name.
Five years after the Clone Wars conclusion, a modified warship attacked Sentinel Base, a remote Imperial outpost. Scans relieved that some components of the ship were from the Invincible and the Lucid Voice, Providence-class cruiser-carriers manufactured by the Free Dac Volunteers Engineering Corps. The Empire launched an investigation into whether QFD or Pammant Docks assisted in the assembly of the warship.