The Defense Information Systems Agency (DISA) of the Department of Defense is seeking industry insights through a Request for Information (RFI) for the development of the Department of Defense Emergency Services Internet Protocol Network (D-ESInet). The objective is to gather information on capabilities for creating a secure and reliable network that will facilitate emergency services communications within the DoD, with plans for an Initial Operational Capability (IOC) in the continental U.S. and a Full Operational Capability (FOC) extending globally. This initiative is critical for enhancing emergency service operations and requires responses that detail design, implementation, and sustainability strategies, including capability statements and rough cost estimates. Interested parties must submit their responses electronically by February 28, 2025, and should direct inquiries to Tricia L. Singler at tricia.l.single.civ@mail.mil or Kari Wuebbles at kari.r.wuebbles.civ@mail.mil.