Alion Science and Technology Corp., Norfolk, Virginia (N6893622D0019); Amentum Services Inc., Germantown, Maryland (N6893622D00020); Leidos Inc., Reston, Virginia (N6893622D00021); SAAB Inc., East Syracuse, New York (N6893622D0022); and Scientific Research Corp., Atlanta, Georgia (N6893622D0023), are awarded a maximum ceiling $249,961,209 cost-plus-fixed-fee, cost reimbursable, indefinite-delivery/indefinite-quantity contract. These provide for research, development, upgrades, sustainment, engineering, integration, testing, and cybersecurity to tactical and electronic warfare threat systems and peripheral instrumentation, including threat simulators, radars, and training instrumentation capable of operating in network-centric warfare and battlespace environments, in support of pre-deployment aircrew training and weapons and countermeasures development to improve aircrew lethality and survivability. Companies have an opportunity to compete for individual orders. Work will be performed in Norfolk, Virginia; Germantown, Maryland; Reston, Virginia; East Syracuse, New York; and Atlanta, Georgia (90%); and various location within the continental U.S. (10%), and is expected to be completed in February 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 competitively procured via an electronic request for proposal; five offers were received. The Naval Air Warfare Center Weapons Division, China Lake, California, is the contracting activity.