The Department of Defense (DOD) is seeking proposals for the Proliferated Warfighter Space Architecture (PWSA) Advanced Capability Development Open Topic. The Space Development Agency (SDA) is looking for novel architecture concepts, systems, technologies, and capabilities that enable leap-ahead improvements for future tranches of currently planned PWSA capability layers or address emerging warfighter needs. The research areas include trusted AI and autonomy, advanced computing and software, integrated sensing and cyber, hypersonics, microelectronics, integrated network systems-of-systems, space technology, renewable energy generation and storage, advanced infrastructure, and advanced manufacturing. The solicitation is open for Phase II proposals only, and proposers must demonstrate the scientific and technical merit and feasibility of their projects. The research will support the development of the PWSA, a resilient military sensing and data transport capability in Low Earth Orbit (LEO). The solicitation provides specific themes and focus areas for potential deliverables, such as integrating commercial sensing to the transport layer, developing optical inter-satellite link (OISL) technology, advancing cyber and networking capabilities, and increasing power for spacecraft bus. The Phase III applications of the research include improving low Earth orbit communication systems and space-based processing for effective distribution of sensor data. The proposal submission deadline is March 31, 2025. For more information and to access the proposal template, visit the DOD SBIR website.