This presolicitation notice is for an IDIQ contract to procure non-commercial unmanned Electromagnetic Spectrum Operations (EMSO) systems using RF and EO/IR sensing, with a focus on threat detection and C2 capabilities. The government intends to award a single IDIQ contract using a Lowest Price Technically Acceptable (LPTA) methodology, with most CLINs being Firm Fixed-Price and a few cost-reimbursement items. A formal Request for Proposal is anticipated to be posted between 16 June 2026 and 30 June 2026. No specific budget amount or location for performance of services is mentioned in the description. All responsible sources may submit a proposal, and industry feedback on the attached draft documents is welcome.