The Department of Defense, specifically the Department of the Navy's NAWC Training Systems Division, is seeking to issue a sole-source Indefinite Delivery Indefinite Quantity (IDIQ) contract for the F-35 "Lightning II" Training Systems and Simulation. This contract aims to provide a comprehensive range of services, including analysis, modeling, simulation, design, development, production, modification, test and evaluation, and product support for F-35 training systems and simulation products, ensuring realistic training events for pilots, aircrew, and maintainers. The integration of these capabilities into the Training Infrastructure System (TIS) Operational Environment is crucial for the effective training of personnel on the complex F-35 air system. Interested parties may respond to the sources sought notice within 15 calendar days to identify their capabilities; however, the government is not obligated to award a contract and will not cover any costs incurred in preparing responses. For further inquiries, contact Tara Malloy-Paull at tara.malloy-paull@jsf.mil or Michael Donaldson at Michael.donaldson2@jsf.mil.