# Guam Defense System (GDS) Request for Solutions Brief (RFSB)

Canonical: https://abierto.us/opportunities/mosaic2604

- Solicitation number: MOSAIC-26-04
- Notice type: Special notice
- Status: Closed. Deadline was July 20, 2026 at 9:00 AM EDT
- Department: Department of the Army
- Agency: Department of the Army
- Contracting office: W6DV PEO M & S Redstone (W50RAJ)
- NAICS: 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)
- Product or service code: AC33 National Defense R&D Services; Defense-Related Activities; Experimental Development
- First posted: July 2, 2026
- Last posted: July 17, 2026
- SAM.gov: https://sam.gov/workspace/contract/opp/17502f22275945949ff73c3f68869edc/view

## Description

REV03 posted on 17 July 2026 adds MITRE to the companies of Non-Government Personnel support for this effort. REV 02 posted on 14 July 2026. Additionally, the CUI Q&A has been provided to all vendors via DoD SAFE.

The RFSB due date is extended to 0900 EST on 20 July 2026. REV 01 Posted on 02 July 2026. The U.S. Army Portfolio Acquisition Executive (PAE) Fires is issuing a Guam Defense System (GDS) Request for Solutions Brief (RFSB) with the intent of awarding one (1) Other Transaction Agreement for Prototype (pOTA) in accordance with (IAW) 10 U.S.C. § 4022. Only U.S. companies with the ability to process and store SECRET information and hardware are eligible to submit a solutions brief. Please refer to the attached RFSB document for additional information.

## Publications

- July 2, 2026: Special notice, due July 15, 2026 at 4:00 PM EDT. Notice c26d7dd86cbc487b9015fecf743eae6b. https://sam.gov/workspace/contract/opp/c26d7dd86cbc487b9015fecf743eae6b/view
- July 13, 2026: Special notice, due July 20, 2026 at 9:00 AM EDT. Notice ff790e01012f4451807cfb6ed8332f4b. https://sam.gov/workspace/contract/opp/ff790e01012f4451807cfb6ed8332f4b/view
- July 14, 2026: Special notice, due July 20, 2026 at 9:00 AM EDT. Notice a77b594eec7b4a7b85f410c7220dc8aa. https://sam.gov/workspace/contract/opp/a77b594eec7b4a7b85f410c7220dc8aa/view
- July 17, 2026: Special notice, due July 20, 2026 at 9:00 AM EDT. Notice 17502f22275945949ff73c3f68869edc. https://sam.gov/workspace/contract/opp/17502f22275945949ff73c3f68869edc/view

## Points of contact

- Sydney Horn, sydney.m.horn.civ@army.mil
- Barbara Cantrell, barbara.a.cantrell2.civ@army.mil

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Source: SAM.gov Contract Opportunities bulk extract. Confirm deadlines on SAM.gov before responding. Cite https://abierto.us/opportunities/mosaic2604.