NASA/NSSC has a requirement for PBG Oxygen Regulator Tester Repair and Calibration. NASA/NSSC intends to issue a sole source contract to MISSION SYSTEMS DAVENPORT INC., 2734 Hickory Grove RD, Davenport, Iowa 52804-1203 under the authority of FAR 12.102(a). It has been determined that MISSION SYSTEMS DAVENPORT INC. is the sole provider of PBG Oxygen Regulator Tester Repair and Calibration. NASA/NSSC will be the procuring center for this effort. Performance will be located at NASA/ Armstrong Flight Research Center (AFRC). The Government intends to acquire Commercial items or services using the provisions, clauses and procedures prescribed in FAR Part 12 for Commercial The NAICS Code for this procurement is 541330. Interested organizations may submit their capabilities and qualifications to perform the effort in writing to the identified point of contact not later than 4:00 a.m. Central Standard Time on 6/11/2026. Such capabilities/qualifications will be evaluated solely for the purpose of determining whether or not to conduct this procurement on a competitive basis. A determination by the Government not to compete this proposed effort on a full and open competition basis, based upon responses to this notice, is solely within the discretion of the government. Oral communications are not acceptable in response to this notice. NASA FAR Supplement Clause 1852.215-84, Ombudsman, is applicable. The Center Ombudsman for this acquisition can be found at https://www.hq.nasa.gov/office/procurement/regs/Procurement-Ombuds-Comp- Advocate-Listing.pdf . Primary Point of Contact: Tracy Bremer Procurement Specialist tracy.g.bremer@nasa.gov