The Defense Advanced Research Projects Agency (DARPA) is hosting a Proposers Day on October 1, 2024, at the Amentum/CENTRA Technology Conference Center in Arlington, VA, to discuss the Sync program (DARPA-PS-24-23) and its associated opportunities. This event aims to inform potential proposers about UUV countermeasures, facilitate discussions on teaming opportunities, and address questions regarding the proposal process, with a structured agenda that includes sessions on Controlled Unclassified Information (CUI) and COLLATERAL SECRET material. Interested participants must register by September 26, 2024, and are required to be U.S. citizens with valid government-issued ID; attendance is limited to 100 registrants, and DARPA will not cover travel costs. For further inquiries, attendees can contact the Coordinator at DARPA-SN-24-114@darpa.mil.