Tactical Air Support Inc., Jacksonville, Florida, is awarded a $265,300,000 firm-fixed-price, cost reimbursable, indefinite-delivery/indefinite-quantity contract. This contract provides non-recurring engineering, inspection, modification, and block upgrade efforts for 16 F-5E and six F-5F Tiger II aircraft from a Swiss Confederation configuration to a Navy/Marine Corps N+/F+ configuration. Additionally, this contract procures eight block upgrade retrofits to existing fleet aircraft. Work will be performed in Jacksonville, Florida (32%); Emen, Switzerland (16%); Carlsbad, California (8%); Clarksburg, Maryland (7%); Grand Rapids, Michigan (6%); Woodland Hills, California (5%); Olathe, Kansas (5%); Stead, Nevada (5%); Salt Lake City, Utah (3%); Minneapolis, Minnesota (2%); Waco, Texas (2%); Auburn, Alabama (1%); Deerfield, Illinois (1%); Fairborn, Ohio (1%); Avenel, New Jersey (1%); Jupiter, Florida (1%); Camarillo, California (1%); Warner Robbins, Georgia (1%); Franklin, North Carolina (1%); and Nashville, Tennessee (1%), and is expected to be completed in June 2027. No funds will be obligated at the time of award; funds will be obligated on individual orders as they are issued. This contract was not competitively procured pursuant to U.S. Code 2304(c)(1). The Naval Air Warfare Aviation Division, Patuxent River, Maryland, is the contracting activity (N0042122D0095).