Top Network Administrator Jobs

Lead design, implementation, and optimization of the global network. Serve as senior technical authority on routing, switching, wireless, security, cloud networking, SD-WAN, automation, and AI-enabled operations. Lead large projects, mentor team members, manage vendors, maintain documentation, support DR/BC, and enforce network governance and standards.

Supports architecture, engineering, administration, and design for a secure DHS infrastructure environment. Responsibilities include cloud and hybrid infrastructure integration, platform monitoring, troubleshooting, performance optimization, incident response, security and compliance, DevSecOps and CI/CD support, technical documentation, and continuous infrastructure improvement.

Leads the design, operation, maintenance, security, and continuous improvement of enterprise network and IT infrastructure. Manages Azure and AWS environments, site and data center interconnects, routing, firewalls, access controls, wireless networks, monitoring, patching, incident response, and infrastructure lifecycle management. The role also mentors infrastructure staff, coordinates service providers, troubleshoots technical issues, documents implementations, and supports business continuity, including occasional extended or nighttime work.

Support operation, maintenance, and security of DoD networks: configure and manage Cisco routers/switches/firewalls and VPNs; perform troubleshooting, diagnostics, and network security tasks; apply network systems management tools in support of mission operations.

Administers and secures enterprise network infrastructure, including firewalls, IDS/IPS, VPNs, switches, routers, and wireless systems. Monitors traffic and SIEM alerts, investigates and responds to incidents, remediates vulnerabilities, and supports network troubleshooting, performance, disaster recovery, compliance, audits, and documentation. The role collaborates with cybersecurity teams, vendors, and internal stakeholders to maintain reliable and resilient municipal systems.

Lead enterprise systems and network administration for a DoD enterprise: oversee servers, virtualization, storage, networking, cloud, incident/outage response, RMF compliance, and geographically dispersed teams to ensure secure, resilient, highly available operations.

Provide Tier 2/3 support for implementation, troubleshooting, maintenance and optimization of IT systems. Manage virtual, storage, server, network, and endpoint environments; perform capacity planning, incident escalation, and performance tuning. Communicate status to agency management and support database administration tasks as needed.

The role involves supporting enterprise IT systems, advanced troubleshooting in Windows environments, and managing identity lifecycle processes using MIM with a focus on national security.

Install, maintain, and troubleshoot campus network infrastructure (routers, switches, wireless, firewalls, cabling). Manage VLANs/VRFs/firewall policies, IPAM, cable activations, inventory, and liaise with Network Engineering and service providers. Support network security tools and mentor student staff.

Designs and administers Linux server and application architectures, maintains system security and configurations, troubleshoots infrastructure issues, and supports incident response. Manages VMware virtualization, NetApp storage, databases, and automation platforms. Develops scripts, recommends technical improvements, and provides leadership and guidance to junior engineers. The role requires an active TS/SCI clearance, U.S. citizenship, on-site work at Fort Liberty, and 10–25% travel.

Manage and support Microsoft 365 (Exchange Online, Entra ID/Azure AD, Teams, SharePoint) and Chicago office network infrastructure. Administer identity and access (MFA, conditional access, RBAC), Fortinet firewall, VPN/LAN/WAN, troubleshoot connectivity, escalate incidents, coordinate with vendors/ISPs, monitor security logs and SIEM, manage Netskope access, and maintain documentation and automation opportunities.

Design, configure and maintain WAN/LAN telecommunication infrastructure; provide tier-2 network/telecom support and troubleshooting; implement network standards, monitoring, security and site transport; assist in installations, testing, and documentation; train others and liaise with management, vendors and users.

Implement and sustain NIPR/SIPR switches, routers, firewalls, load balancers, and network management tools in a Cisco ACI datacenter. Perform network management, analysis, troubleshooting, patch and firmware deployment using automation, and maintain DISA STIGs. Develop SOPs, network documentation, train junior staff, and monitor ongoing network operations.

Design, build, configure, document and support network and security connectivity for critical projects using Cisco, F5, A10, Juniper and Brocade equipment. Perform protocol-level troubleshooting, monitoring, firewall/load‑balancer administration, IDS/IPS and DDoS mitigation. Support Linux/Windows/VMware environments and create automation/scripting where applicable.

Provide network administration for NOAA satellite operations: install, maintain, monitor, and upgrade LAN/WAN infrastructure; troubleshoot anomalies; create SOPs and topology diagrams; support security hardening, compliance testing, and on-call after-hours support.

Install, configure, and maintain LAN/WAN, internet systems, desktops and mobile devices. Support print servers and VMware virtual environment. Configure and troubleshoot Cisco ASA firewalls, review event logs on Windows Server 2008/2012, and administer Active Directory in an enterprise environment.

Provide Tier 3 network and infrastructure support: monitor ticketing, manage file/print servers, administer clustered SQL Server, Hyper-V, Exchange/Office365/Azure, Cisco perimeter hardware, Active Directory, and remote user access (VPN/FTP). Support infrastructure and core teams, recommend policy/procedure improvements, and troubleshoot backups and SAN/SharePoint systems as needed.

Manage the lifecycle of telecommunications services, ensuring robust network connectivity and acting as a liaison between IT and external providers. Oversee connectivity management, vendor relationships, and technical provisioning while maintaining accurate documentation.

Administers, maintains, secures, and troubleshoots enterprise IT systems in a Department of Defense environment. Responsibilities include Windows Server and Active Directory administration, VMware support, system monitoring, patching, STIG-compliant configuration, RMF documentation, and enterprise tool support across Citrix, SharePoint, and ServiceNow. The role requires collaboration with cybersecurity, network, and engineering teams, thorough documentation, periodic travel, and an active Secret clearance.

Design, configure, provision and support State of Colorado public safety IP/MPLS network (microwave, DTR) handling voice, data, video and cloud. Work in a service-provider environment with MPLS/VRFs/BGP, TACACS+/AAA, VMware cloud and Linux. Perform network planning, peering, NMS/OSS, DDoS monitoring/mitigation, use Wireshark and Splunk/elastic logging, and support Cisco, Juniper, Coriant and Aviat platforms. Flexible schedule including on-call.

Manage and administer networks across two data centers, home office campus, and branch offices. Troubleshoot routers, L2/L3 switches, WAN devices and firewalls; plan and implement upgrades; coordinate contracted vendors; administer voice/VoIP systems; propose network enhancements; perform occasional after-hours maintenance. Communicate with varied audiences and support network security and access control.

Lead and operate voice, data, video and security network services across data centers and campuses. Manage core services (DNS, DHCP, AD, IPAM), monitoring (Solarwinds, NetFlow, Cisco Prime), VPN/MPLS WAN, VoIP (Avaya/Cisco), load balancers (Cisco CSS/CSM, F5 LTM) and firewalls (Cisco, Checkpoint). Provide 24x7 on-call support, packet-level troubleshooting and equipment installs, support video collaboration, IVR/call center integration, and supplier/site builds.

Provide network and server administration for a multi-site environment (200+ workstations, ~30 servers), including installation, configuration, troubleshooting, hardware and network repairs, Exchange migration support, VOIP and storage administration, firewall and security compliance with Virginia court and police standards, documentation, and emergency support in the absence of IT staff.

Provide daily administration, troubleshooting, and maintenance for network, wireless, and firewall environments. Resolve tickets, diagnose issues, implement interim fixes, document actions, and assist senior engineers. May lift equipment up to 50 lbs and climb ladders.

Administer and troubleshoot network security infrastructure including Checkpoint/Cisco ASA firewalls, F5 GTM/LTM, Bluecoat proxy/antivirus, IDS/IPS, Gigamon, and Infoblox. Use packet-sniffer data for network troubleshooting and provide strong problem-resolution for security/network incidents.