Network Engineer

Our client is seeking a Network Infrastructure Engineer to support the day-to-day operation, security, reliability, and performance of an enterprise network in an on-site work environment. This is a hands-on network engineering role supporting LAN infrastructure, switching, firewalls, DNS/DDI, authentication services, VPN connectivity, subnetting, network segmentation, monitoring, and physical network infrastructure. The Network Infrastructure Engineer will work closely with onsite IT personnel and customer technical staff to troubleshoot issues, coordinate infrastructure changes, support maintenance activities, and keep critical network services operating reliably. The ideal candidate has strong practical networking fundamentals and experience working with technologies such as Cisco switching, Fortinet FortiGate, Infoblox, RADIUS, VPNs, and enterprise network-management tools. Success in this role means maintaining a stable, secure, and well-documented network environment where outages and connectivity issues are resolved quickly and infrastructure changes are implemented safely and effectively. What You Will Do Configure, administer, maintain, and troubleshoot enterprise network infrastructure. Support LAN connectivity, switching, routing, VLANs, subnetting, and network services. Configure and maintain Cisco switches, including VLAN administration, switch-port assignments, and performance troubleshooting. Support Juniper and Aruba switching technologies as required. Administer Fortinet FortiGate firewalls, including firewall policies, access controls, configuration changes, and connectivity troubleshooting. Manage and support Infoblox DNS, DHCP, and IP Address Management services. Support RADIUS authentication and related access-control technologies. Assist with LDAP, Active Directory, and other enterprise authentication services. Support network connectivity across multiple environments, including subnetting, routing, network segmentation, and IP addressing. Configure, maintain, and troubleshoot VPN services supporting secure remote connectivity. Monitor network availability, performance, and infrastructure health using enterprise network-management and monitoring tools. Troubleshoot outages, connectivity problems, authentication failures, DNS issues, routing problems, and other network incidents. Support installation, testing, labeling, and documentation of copper and fiber network cabling. Install and support network equipment within telecommunications and communications closets. Maintain accurate network diagrams, IP address records, firewall and switch configurations, cabling documentation, and infrastructure inventories. Coordinate maintenance activities, configuration changes, upgrades, and network troubleshooting with onsite IT personnel and customer technical staff. Provide technical support during critical network activities and scheduled maintenance windows. Communicate incident status, troubleshooting results, technical risks, and recommended resolutions to stakeholders. Participate in after-hours support when required for critical incidents or planned maintenance. Perform other related network engineering responsibilities as assigned. What You Will Bring Required Qualifications Bachelor's degree in Computer Science, Information Technology, Network Engineering, or a related technical discipline, or an equivalent combination of education and relevant professional experience. Hands-on experience supporting enterprise network infrastructure. Experience configuring, administering, and troubleshooting Cisco switches and enterprise LAN environments. Working experience with Fortinet FortiGate firewalls and network-security configurations. Experience supporting Infoblox or comparable DNS, DHCP, and IP Address Management technologies. Knowledge of RADIUS, LDAP, Active Directory, VPN technologies, and network authentication services. Strong understanding of TCP/IP, DNS, DHCP, subnetting, VLANs, routing, switching, and IP addressing. Experience troubleshooting network outages, connectivity issues, authentication problems, and infrastructure incidents. Experience using enterprise network monitoring and management tools. Understanding of copper and fiber-optic cabling, telecommunications closets, and physical network infrastructure. Ability to maintain accurate network documentation, diagrams, inventories, and configuration records. Strong analytical, troubleshooting, communication, and organizational skills. Ability to work effectively with onsite IT staff, network engineers, and customer technical personnel. Ability and willingness to work in an on-site environment. Ability to obtain and maintain a U.S. Government security clearance. Preferred Qualifications Experience with Juniper switching technologies. Experience with Aruba switching technologies. Experience supporting N-Wave or comparable wide-area network connectivity. Cisco CCNA or comparable Cisco certification. CompTIA Network+. Fortinet certification. Juniper or Aruba certification. Experience supporting network infrastructure within federal government, government contracting, or other regulated environments. Work Authorization / Security Clearance Requirements Ability to obtain and maintain a U.S. Government security clearance. Work Environment This position is performed in an on-site work environment. No routine travel is required. Physical Requirements Prolonged periods of sitting at a desk and working on a computer. Ability to access telecommunications closets, technical spaces, and customer facilities. Ability to support installation and inspection of network equipment and cabling. Compensation $56.79 – $62.50 per hour, commensurate with experience and qualifications.