The U.S. Army Contracting Command (ACC-APG) Orlando, on behalf of the Capability Program Executive Office Simulation, Training, Test & Threat (CPE ST3), is officially soliciting proposals for the Medical Instructor/Operator Support Services (MIOSS) . This requirement is to procure continuous, uninterrupted I/O support for the MSTCs as well as support for other miscellaneous courses and training events located at Army MSTCs throughout the CONUS and OCONUS. The anticipated contract is for a single award Firm Fixed Price Mandatory Minimum Staffing Baseline (MMSB) contract which has a base period and four 1-year option periods. Detailed instructions, performance work statements, and submission guidelines are fully detailed within the attached solicitation W900KK-26-R-A017. Proposals are due 27 July 2026 at 09:00 EDT . Late submissions will not be considered for evaluation. Notice of Intent (Requested): To assist the Government in administrative preparations and oral presentation scheduling, all interested Prime Contractors intending to submit a proposal are requested to notify the Government via email at usarmy.orlando.cpe-st3.mbx.mioss@army.mil within one (1) week of this posting. Note: This notification is voluntary and does not preclude the evaluation of any timely received proposal. Oral Presentations : Will be scheduled for in person presentations and coordinated with Offerors after all proposals have been received and logged.