U.S. Army Combat Capabilities Development Command – Chemical Biological Center (DEVCOM CBC), Rock Island, IL, on behalf of the Office of the Secretary of Defense, Office of the Assistant Secretary of Defense for Industrial Base Policy via its Innovation Capability and Modernization Program (10 U.S.C. § 4817), in conjunction with Army Contracting Command – Rock Island (ACC-RI), manages the Cornerstone Other Transaction Agreement (OTA), in accordance with 10 U.S.C. § 4022. Cornerstone was architected to create a broad-based, flexible and enduring public-private consortium focused on strategic strengthening of the U.S. Manufacturing and Defense Industrial Base and provide a strong complement to the mandates in Presidential Executive Order 13806. ACC-RI, on behalf of DEVCOM CBC and Lake City Army Ammunition Plant (LCAAP), intends to issue a competitive Cornerstone Initiative Request (CIR) for a prototype project related to LCAAP Security Requirements on or after 5 June 2026, with an estimated closing date of three weeks after issuance. The CIR for this effort is restricted to Cornerstone consortium members. The CIR will solicit whitepaper proposals for one (1) Fixed Price OTA. Period of performance for LCAAP tasks will be 12 months; additional tasks and sites may be included. A non-competitive follow-on production OT may be awarded following a successful prototype. The objective of this effort is to design, deliver, integrate, and sustain a layered sensor fusion and perimeter security system to enhance situational awareness, improve security response, and validate the systems effectiveness in a live operational environment. A site visit will be offered and is anticipated to be held the week of 15 June 2026. Interested vendors must register in advance AND attend in order to present a proposal for Government consideration. The CIR will contain specific instructions for registration. Any OT awarded as a result of this initiative will incorporate revised FAR clause 52.204-25, Prohibition on Contracting for Certain Telecommunications and Video Surveillance Services or Equipment, dated Aug 2020. The CIR for LCAAP Security Requirements will be communicated to the Cornerstone consortium and companies with pending applications via email. Entities are required to have begun the membership process for their submission to be reviewed. Entities must be members of the Cornerstone consortium, with a signed Cornerstone Consortium Management Agreement, to be awarded this OTA task. Contractors may obtain Cornerstone registration information by inquiring at: usarmy.ria.devcom-cbc.mbx.cornerstone-ota@army.mil or https://cornerstone.army.mil/. Interested parties should stay alert for any changes that may be published to this sam.gov posting. Please email all questions and responses to the following mailbox: usarmy.ria.devcom-cbc.mbx.cornerstone-ota@army.mil This Special Notice is for planning purposes only and does not constitute a CIR or an obligation on behal…