This is a sole-source, firm-fixed-price contract to Northrop Grumman Systems Corporation/Northrop Grumman Marine Systems for repairs to SSTG No. 1 and No. 2 onboard a Virginia-Class Submarine at Pearl Harbor Naval Shipyard and Intermediate Maintenance Facility (PHNSY & IMF). The government justified this sole-source action after a sources sought notice received only one response that was deemed not capable of performing the requirement. The procurement falls under NAICS 336611 (Ship Building and Repair) with a 1,300-employee size standard. The solicitation is available only upon request via email to the listed points of contact, and all amendments must be acknowledged in the offer. All questions must be submitted in writing to the contacts, and offers must follow the CLIN structure in the solicitation.