The F-35 "Lightning II" Program Office intends to issue a sole-source Indefinite Delivery Indefinite Quantity (IDIQ) contract to LM-Aero, Fort Worth, TX. This contract will cover a comprehensive range of services, including analysis, modeling, simulation, design, development, production, modification, test and evaluation, laboratory infrastructure, sustainment, delivery, refurbishment, relocation, and product support for F-35 training systems and simulation products. The goal is to provide realistic training events and qualification exercises for pilots, aircrew, and maintainers, integrating these capabilities into the Training Infrastructure System (TIS) Operational Environment. LM-Aero is considered the only source with the necessary expertise due to its role as the F-35 aircraft's sole designer, developer, and manufacturer. Other interested parties may respond to this sources sought notice within 15 calendar days to identify their capabilities; however, the government is not obligated to award a contract and is not responsible for any costs incurred in preparing responses. This is an informational notice, not a request for proposal, and the data is export-controlled.