# HALO Europa Program Solicitation

Canonical: https://abierto.us/opportunities/sdaps2504

- Solicitation number: SDA-PS-25-04
- Notice type: Solicitation
- Status: Closed. Deadline was July 28, 2025 at 12:00 PM EDT
- Department: Department of Defense
- Agency: Department of the Air Force
- Contracting office: FA2401 Space Development Agency Sda (FA2401)
- NAICS: 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)
- Product or service code: AC13 National Defense R&D Services; Department Of Defense - Military; Experimental Development
- Place of performance: Chantilly, Virginia
- County: Fairfax County (FIPS 51059). https://abierto.us/counties/fairfax-county-va-51059
- City: Chantilly. https://abierto.us/cities/chantilly-va-5114744
- First posted: July 1, 2025
- Last posted: July 2, 2025
- SAM.gov: https://sam.gov/workspace/contract/opp/a1c4b7016e6e4ef49a47194deaae3110/view

## Description

The Space Development Agency (SDA) is issuing this Other Transaction (OT) solicitation to establish the Tranche 2 Demonstration and Experimentation System (T2DES) Europa program. Future SDA constellations will leverage technologies and methods matured on the Europa SVs. SDA is executing the Europa program using the Hybrid Acquisition of Low-Earth Orbit (HALO) contract vehicle, which is SDA’s acquisition approach to solicit rapid and affordable mission feasibility demonstrations.

The Europa solicitation is limited to pre-screened members of the HALO prime contractor pool. This solicitation seeks Other Transaction (OT) prototype order proposals under the existing HALO vehicle to be awarded as fixed price milestones.

## Publications

- July 1, 2025: Solicitation, due July 28, 2025 at 12:00 PM EDT. Notice 718ed6b15f2e4341ab34d4a7ae24410c. https://sam.gov/workspace/contract/opp/718ed6b15f2e4341ab34d4a7ae24410c/view
- July 2, 2025: Solicitation, due July 28, 2025 at 12:00 PM EDT. Notice a1c4b7016e6e4ef49a47194deaae3110. https://sam.gov/workspace/contract/opp/a1c4b7016e6e4ef49a47194deaae3110/view

## Points of contact

- ussf.pentagon.sda.mbx.sda-ps-25-04@mail.mil, ussf.pentagon.sda.mbx.sda-ps-25-04@mail.mil

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Source: SAM.gov Contract Opportunities bulk extract. Confirm deadlines on SAM.gov before responding. Cite https://abierto.us/opportunities/sdaps2504.