Provide SME engineering services to design, configure, test, implement, and sustain STIG-compliant network and security architectures, including NAC (802.1x), reverse proxy and load balancing, web filtering, DNS/DHCP/IPAM, VPN, wireless/IDS, VDI support, VoIP/VTC/streaming, Check Point firewalls and MDM, NMS tool suites, MPLS architecture, SATCOM support, and DR/COOP planning; perform Tier IV troubleshooting and produce required technical documentation (ECRs, ITRs, NSOs, AARs, test plans/reports, and as-built diagrams). Provide Cloud-certified SME engineering support for on-premises to Cloud migrations, coordinating with CSPs (e.g., Azure, AWS, Oracle, Google Cloud, MilCloud2) and facilitating integration with Secure Cloud Computing Architecture (SCCA) BCAP in multi-cloud environments.