The Department of Homeland Security, specifically the U.S. Coast Guard, is conducting a market survey to identify domestically manufactured alternatives to Siemens TX-I/O modules, which are integral to the Siemens Building Automation System. The Coast Guard is seeking alternatives to specific Siemens TX-I/O module products, ensuring that any proposed solutions are manufactured in the United States and meet stringent domestic sourcing requirements, including that at least 65 percent of the total cost of components must come from domestically sourced materials. Interested firms must respond by November 18, 2025, providing evidence of prior work with comparable domestically manufactured modules and detailed information about their proposed solutions, with inquiries directed to Barbara Williamson-Garris and Sharan Lind via email.