Operational Test and Training Infrastructure (OTTI) Commercial Solutions Opening (CSO)

Amendment 0011: Please see the attached OTTI CSO FA2553-25-S-C001 Amend 0011. This amendment supersedes all versions of the OTTI CSO. Annual Notice: In accordance with DFARS 212.7004(b), this posting serves as an annual notice of the OTTI CSO FA2553-25-S-C001 publishing. Amendment 0010: Please see the attached OTTI CSO FA2553-25-S-C001 Amend 0010. This amendment supersedes all versions of the OTTI CSO. AOI 05 Q&As: Please see the attached OTTI CSO AOI 05 Questions_Answers document for AOI 05: Continuous Fitness Assessment (CFA). The Phase I submission accepted until date for AOI 05 has been extended from 7 November 2025 to 5 December 2025. Amendment 0009: Please see the attached OTTI CSO FA2553-25-S-C001 Amend 0009. This amendment supersedes all versions of the OTTI CSO. AOI 05: Continuous Fitness Assessment (CFA) is currently pending Government updates. Additional information will be released to industry via an amendment to this solicitation. The Phase I submission accepted until date for AOI 05 has been extended from 8 October 2025 to 7 November 2025. Amendment 0008: Please see the attached OTTI CSO FA2553-25-S-C001 Amend 0008. This amendment supersedes all versions of the OTTI CSO. Amendment 0007: Please see the attached OTTI CSO FA2553-25-S-C001 Amend 0007. This amendment supersedes all versions of the OTTI CSO. Amendment 0006: Please see the attached OTTI CSO FA2553-25-S-C001 Amend 0006. This amendment supersedes all versions of the OTTI CSO. AOI 04 Q&As Rev 01: Please see the attached (CUI) OTTI CSO AOI 04 - Questions_Answers_Rev 01 document for AOI 04: Multirole Satellite Frequency In-field Test Suite (MSFITS). This updated document provides additional questions and answers (AOI 04 - Q16 through AOI 04 - Q30). Amendment 0005: Please see the attached OTTI CSO FA2553-25-S-C001 Amend 0005. This amendment supersedes all versions of the OTTI CSO. AOI 04 Q&As: Please see the attached (CUI) OTTI CSO AOI 04 Questions_Answers document for AOI 04: Multirole Satellite Frequency In-field Test Suite (MSFITS). Amendment 0004: Please see the attached OTTI CSO FA2553-25-S-C001 Amend 0004. This amendment supersedes all versions of the OTTI CSO. Amendment 0003: Please see the attached OTTI CSO FA2553-25-S-C001 Amend 0003. This amendment supersedes all versions of the OTTI CSO. AOI 02 Q&As Rev 01: Please see the attached OTTI CSO AOI 02 Questions_Answers_Rev01 document for AOI 02: National Space Test and Training Complex (NSTTC) Range Control System Enhancements. This updated document provides an additional question and answer (AOI 02 - Q10). AOI 03 Q&As: Please see the attached OTTI CSO AOI 03 Questions_Answers document for AOI 03: Distributed Synthetic Training Environment Evolution & Prototyping. AOI 02 Q&As: Please see the attached OTTI CSO AOI 02 Questions_Answers document for AOI 02: National Space Test and Training Complex (NSTTC) Range Control System Enhancements. Amendment 0002: Please see the attached OTTI CSO FA2553-25-S-C001 Amend 0002. This amendment supersedes all versions of the OTTI CSO. Amendment 0001: Please see the attached OTTI CSO FA2553-25-S-C001 Amend 0001. This amendment supersedes all versions of the OTTI CSO. The United States Space Force (USSF) Operational Test and Training Infrastructure (OTTI) is seeking innovative capabilities, solutions, and technological advancements. The OTTI Commercial Solutions Opening (CSO) is being issued in accordance with Defense Federal Acquisition Regulation Supplement (DFARS) 212.70. OTTI is requesting submissions from interested Offerors in response to the specific Areas of Interest (AOI) identified in the OTTI CSO. Please see the attached OTTI CSO FA2553-25-S-C001 for all information.