This opportunity provides full-spectrum C5ISR technical support for Mission-Specific Network Engineering (MSNE) projects, covering the entire engineering life cycle from requirements to sustainment. The work includes systems engineering, integration, testing, and RDTE support for projects ranging from stand-alone systems to global communication solutions. Performance locations include both CONUS and OCONUS. No specific budget amounts or non-bid timelines are mentioned in the description. The contract is a seaport task order solicited via the PIEE module.