This is a sole-source requirement for a four-year Software and IA Maintenance Subscription (one base year plus three option years) for Advanced Simulation Technology, Inc. (ASTi) Telestra systems used by the Joint Simulation Environment (JSE) Integration Lab. The performance location is Building 1020, Edwards Air Force Base (EAFB). The base cost of the subscription is $23,628 for 36 months. The justification cites proprietary intellectual property and cost-ineffectiveness of replacing the existing system, which was previously purchased for $120,621.20 and $30,544.72. Interested parties may submit a capability statement, but the government intends to negotiate on a sole-source basis.