CACI seeks an experienced Communications Subject Matter Expert with 12+ years of hands-on RF communications and network experience to provide Life Cycle Sustainment and Maintenance support for VSAT satellite systems, Cisco-based networks, and deployable DoD C5ISR communications environments. The role involves on-site installation, troubleshooting, repair, and customer technical support across complex communications equipment and infrastructure.… Responsibilities include system diagnosis, operational quality checks, customer training, and liaison duties for assigned projects. Required qualifications include deep expertise with Cisco routers/switches, VSAT/Idirect systems, HAIPE encryption devices, BGAN/INMARSAT networks, LAN/WAN architecture, and demonstrated leadership in Joint Warfighter C5ISR systems.