Senior Network Engineer at ECS Corporate Services Senior Network Engineer at ECS Corporate Services in Quantico, Virginia Posted in about 19 hours ago. Everforth ECS is looking for a Senior Network Engineer to support work in its Quantico, VA office. Position Overview This is a hands-on position responsible for the design, implementation, maintenance, and troubleshooting of network, server, virtualization, storage, and supporting infrastructure. The role has a strong emphasis on networking, switching, firewalls, DNS, and infrastructure troubleshooting and works closely with the technical team lead, development, database, and cybersecurity personnel. Primary Responsibilities Design, administer, maintain, and troubleshoot enterprise network, server, virtualization, storage, firewall, and supporting infrastructure . Manage switching, routing, VLANs, network segmentation, DNS, firewall policies, NAT, VPNs, and related network services. Support Windows Server infrastructure and associated enterprise services. Diagnose complex infrastructure and connectivity issues across physical, network, virtualization, operating system, and application layers. Maintain virtualization, storage, backup/recovery, logging, monitoring, and authentication infrastructure. Perform hands-on datacenter work including rack/stack, copper and fiber cabling, optics/transceivers, hardware replacement, firmware upgrades, and physical-layer troubleshooting . Support infrastructure upgrades, lifecycle planning, cybersecurity requirements, and vulnerability remediation. Maintain and contribute to technical documentation, diagrams, SOPs, and annual system documentation reviews. Required Qualifications 5+ years of relevant experience in network engineering, infrastructure engineering, or a related discipline. Bachelor's degree in IT, Computer Science, Engineering, Cybersecurity, or related field, or equivalent education, certifications, and experience . Strong enterprise networking knowledge including TCP/IP, subnetting, switching, routing, VLANs, ACLs, NAT, VPNs, DNS, and network segmentation . Strong understanding of physical network infrastructure including Ethernet, copper/fiber, optics/transceivers, and link troubleshooting . Working knowledge of Windows Server, Active Directory, Group Policy, virtualization, enterprise storage, backup/recovery, and infrastructure monitoring . Strong cross-platform troubleshooting skills and the ability to independently research, diagnose, and resolve complex technical problems. Working knowledge of cybersecurity hardening principles and secure enterprise environments. U.S. citizenship and ability to obtain and maintain a Secret security clearance . Must possess or obtain an applicable DoD 8140 certification, such as CompTIA Security+ CE, within 90 days of employment . Ability to work primarily on-site at MCB Quantico.