The Defense Information Systems Agency (DISA) /Defense Information Technology Contracting Organization (DITCO), Scott Air Force Base, Illinois, intends to negotiate on a sole source basis with Engineering Software Research and Development, Inc. (Commercial and Government Entity Code: 006Q7), 111 West Port Plaza, Suite 825, Saint Louis, Missouri 63146-3024 United States. The proposed contract action is for the acquisition of a subscription for brand name, commercial-off-the-shelf, sole source StressCheck annual software maintenance and support renewal for Fleet Readiness Center Southeast (FRCSE). The period of performance is September 01, 2026 through August 31, 2027 with four, 1-year option periods. At this time, Engineering Software Research and Development, Inc, is the only source capable of providing all necessary products. The statutory authority for other than full and open competition is 10 USC 2304 (c) (1), as implemented by FAR 6.302-1(a)(2)(iii), only one responsible source and no other supplies or services will satisfy agency requirements. Companies who believe they can provide this service must indicate their interest in writing within 7 days of this notification and include a detailed capability statement. No reimbursement for any cost connected with providing capability information will be provided. All responsible sources will be considered in evaluating the determination to issue a sole-source contract. Quotations received in response to this notice cannot be accepted since this synopsis cannot be considered a request for quote or a request for proposal. A solicitation will NOT be posted to SAM.gov due to the sole source nature of the requirement. This notice of intent is not a request for competitive quotes. Vendors may send written correspondence to the following address: joshua.t.schaufelberger.civ@mail.mil and alexis.n.corley.civ@mail.mil. All responsible sources will be considered for evaluating the determination to issue a sole source purchase order. A determination by the Government not to compete with this proposed contract based upon responses to this notice is solely within the discretion of the Government. The North American Classification System (NAICS) code 513210 will be used for determining company size status.