Army open solicitation (AOS)

Special Notice Posted May 1, 2025

Not the latest version. See the latest pre-solicitation from Aug 27, 2026.

Solicitation number: W9128Z-25-S-A002
Agency: ACC Aberdeen Proving Ground Army Contracting Command, Department of Defense
Set-aside: No set-aside

Opportunity facts

Points of contact: Kristin Height usarmy.apg.acc.mbx.army-open-solicitation@army.mil

Notice details come from SAM.gov. Updated Oct 19, 2026.

About this opportunity

Written by GovTribe AI · Oct 19, 2026

The U.S. Army Contracting Command–Aberdeen Proving Ground issued an Army Open Solicitation (AOS W9128Z-25-S-A002) on 1 May 2025 to acquire innovative commercial and research-and-development solutions across all Army Mission Areas; the solicitation remains open indefinitely until canceled and accepts submissions on a rolling basis through two pathways: Active Capability Gap (ACG) submissions and Call for Solutions amendments posted on SAM.gov.

The AOS aims to revive the industrial base, maximize Army lethality, and rapidly deliver commercial technology advancements and R&D solutions to the Warfighter. ACC-APG intends to award contracts or Other Transactions (OTs) using a combination of authorities including FAR 6.102(d)(2), FAR 35.016 Broad Agency Announcement, DFARS 235.016, 10 U.S.C. 4021–4023, 10 U.S.C. 3458 Commercial Solutions Opening, and the Employee Stock Ownership Pilot program authorized by Section 874 of the NDAA FY2022 (amended by Section 872 of the NDAA FY2024). The default approach leverages Commercial Solutions Opening authority with OT instruments, particularly for software acquisition under the Software Acquisition Pathway.

Twelve Army Example Areas are covered: Intelligence, Electronic Warfare and Sensors; Tactical Communications; Ground Combat Systems; Soldier Equipment; Missiles and Space; Simulation Training and Instrumentation; Aviation; Supply Chain and Logistics; Installation Support and Innovation; Advanced Manufacturing; Army Enterprise Business Solutions; and Data Engineering and Software (with six subsections addressing MOSA enablement, Digital Engineering environments, cybersecurity tooling, supply chain risk management, kill chain resilience, and other capabilities).

Contractors may respond via Active Capability Gap submissions—a rolling, three-phase process (Solution Brief, optional Live Pitch, full Solution Proposal) accepting unclassified solutions up to 5 pages or 15 slides—or await specific Call for Solutions amendments. ACG Solution Briefs must include executive summary, high-level concept, Rough Order of Magnitude and schedule (maximum two pages), company viability, business status certification, and intellectual property statements. The government anticipates evaluation within 90 days and reserves the right to select all, some, or no submissions. Eligible contractors must maintain SAM registration with a valid Unique Entity ID, register in the Wide Area Work Flow invoicing system, represent small business status if applicable, and obtain responsibility determinations. Foreign-owned businesses may participate independently or via teaming arrangements, subject to security clearance capabilities. The government does not reimburse submission costs, which cannot be included in pricing. Non-Government advisors with signed NDAs may support evaluations. ACG submissions are directed to usarmy.apg.acc.mbx.army-open-solicitation@army.mil with the Army Example Area specified in the subject line. The solicitation has been amended multiple times; the most recent version (26 March 2026) incorporates expanded Army Example Areas and refined ACG procedures.

Notice text

16 versions

Update #16 · Latest · Oct 19, 2026

26 MARCH 2026 AMENDMENT 11 - The AOS document and Attachment 1 document are revised to add Army Example Area (AEA) updates, which are posted under "Attachments".

23 FEBRUARY 2026 AMENDMENT 10 - AOS document is revised to add a new Army Example Area (AEA) and posted under "Attachments".

3 DECEMBER 2025 AMENDMENT 9 - AOS document and Attachment 1 document are revised and posted under "Attachments".

7 AUGUST 2025 AMENDMENT 8 - AOS document and Attachment 1 document are revised and posted under "Attachments".

24 JULY 2025 AMENDMENT 7 - AOS document is revised and posted under "Attachments". The revision provides an update to the Active Capability Gap (ACG) mailboxes listed under Section J - Contracting Information. Additionally, Request for Information (RFIs) will at times be posted under "Links" to create more awareness to AOS interested vendors. RFIs posted under AOS are for market research purposes only and the Government has no obligation to post a subsequent Call for Solution under AOS for the requirement.

10 JULY 2025 AMENDMENT 6 - Attachment 1 document is revised and posted under "Attachments".

1 JULY 2025 AMENDMENT 5 - AOS document is revised and posted under "Attachments". The revision provides the remaining Active Capability Gap (ACG) mailboxes listed under Section J - Contracting Information.

24 JUNE 2025 AMENDMENT 4 - AOS document is revised and posted under "Attachments".

11 JUNE 2025 AMENDMENT 3 - AOS and Attachment 1 documents are revised and posted under "Attachments".

20 MAY 2025 AMENDMENT 2 - Going forward, all Call(s) for solutions will be posted under "Links" within this AOS Special Notice.

15 MAY 2025 AMENDMENT 1 - Attachment 1 for the Army Open Solicitation (AOS) Active Capability Gap (ACG) Procedures is incorporated within this special notice.

*Note* - The mailboxes for the Active Capability Gap (ACG) Portion are available in the AOS document, Section J - Contracting Information

The Army Open Solicitation (AOS) aims to support all Army Mission Areas and to revive the industrial base in order to maximize the lethality of the Army. This solicitation will enable the Army to rapidly acquire and deliver innovative solutions to the Warfighter using commercial technology advancements and research and development solutions. Additionally, this solicitation highlights procurements subject to the Software Acquisition Pathway (SWP).

The U.S. Army Contracting Command – Aberdeen Proving Ground is interested in making awards by maximizing existing authorities and combining any single authority or a combination of the authorities below:

Federal Acquisition Regulation (FAR) 6.102(d)(2) – Other Competitive Procedures
FAR 35.016 Broad Agency Announcement / Defense Federal Acquisition Regulation
Defense Federal Acquisition Regulation Supplement (DFARS) 235.016 Broad Agency Announcement / DFARS 235.006-71 – Competition
10 U.S.C. §4021 – Research projects: transactions other than contracts and grants
10 U.S.C. §4022 – Authority of the Department of Defense (DoD) to carry out certain prototype projects
10 U.S.C. §4023 – Procurement for experimental purposes
10 U.S.C. §3458 – Authority to acquire innovative commercial products and commercial services using general solicitation competitive procedures / DFARS 212.70 – Defense Commercial Solutions Opening
Employee Stock Ownership Pilot (ESOP) Program authorized by Section 874 of the National Defense Authorization Act (NDAA) for Fiscal Year (FY) 2022, as amended by Section 872 of the NDAA for FY2024.

ACC-APG is seeking to obtain commercial, innovative solutions or potential capabilities that fulfill requirements, close capability gaps, or provide potential innovative technological advancements, and pursue meaningful proposals with varying technical or scientific approaches that can be reasonably anticipated. ACC-APG is also seeking to obtain basic research, applied research, advanced technology development, and advanced component development, prototypes and incidental production that demonstrate that fulfill requirements, close capability gaps, and/or provide meaningful solutions.

Interested parties are highly encouraged to review the Army Open Solicitation to obtain additional information on the process for providing solutions under this solicitation. The Army Open Solicitation enables companies to respond to Active Capability Gaps within the Army Mission Areas and through the Government release of Calls for Solutions. Both methods are outlined in the solicitation but utilize two separate processes.

As Amendments are posted on the Army Open Solicitation, the Government will delete the previous version and upload the latest conformed version. All revisions will be highlighted in yellow to allow for transparency of the revisions made.

Request for Information (RFIs) posted under AOS are for market research purposes only and the Government has no obligation to post a subsequent Call for Solution under AOS for the requirement.

Please note that this Army Open Solicitation will remain open in perpetuity until canceled by the U.S. Army. However, Call for Solutions will be open for a limited period of time and will include individual response times.

Update #15 · Mar 19, 2026