Your experience installing, maintaining, and troubleshooting LAN/WAN systems directly translates to the responsibilities of a Network Engineer. Your expertise in cable and antenna systems, including fiber optics, copper, and coaxial cables, aligns with the physical infrastructure knowledge required for this role. Furthermore, your experience with tools and test equipment for network diagnostics is highly relevant.

Your responsibilities included maintaining and monitoring network performance, coupled with your experience in installing and maintaining distribution equipment. That experience gives you a solid foundation for Systems Administration, which involves managing and maintaining computer systems and servers.

Given your work with secure communication systems like the Defense Red Switch Network (DRSN), you have familiarity with the importance of secure data transmission. Learning more about modern security practices will help you transition to a Security Engineer role, where you'd protect networks and systems from threats.

Your experience with network infrastructure and distribution systems provides a base understanding of how data is transmitted and managed. With additional training in cloud technologies, you can leverage your existing skills to become a Cloud Engineer, building and maintaining cloud-based infrastructure.