Missile Defense Agency - High Altitude Infrared Search and Track (HAIRST)

**Due date for submissions has been extended to November 13, 2025. Please see Amendment 1 for details.** The Missile Defense Agency (MDA) “High Altitude Infrared Search and Track (HAIRST)” solicitation seeks proposals related to the delivery and demonstration of infrared sensor prototypes hosted on high altitude platforms. These prototypes must be capable of both searching a large volume for incoming missile threats and generating high-resolution tracks. Performers will be required to access, handle, receive, and store SECRET information in performance of this effort. Offerors must have an active SECRET (or higher) Facility Clearance (FCL) with SECRET (or higher) Safeguarding Level to be eligible to respond to this solicitation. An “Offeror’s Library” with Controlled Unclassified Information (CUI) necessary to respond to this solicitation is available for offerors with an active SECRET (or higher) FCL with SECRET Safeguarding Level. Details on requesting access to this library are contained within the attachment. This solicitation is posted under MDA's Nimble Options for Buying Layered Effects (NOBLE) Announcement, Solicitation No. HQ0860-25-S-0001.