Top Network Administrator Jobs

Provide hands-on administration and support for high-performance computing networks: configure and maintain switches, routers, and firewalls; ensure STIG compliance; perform backups and disaster recovery; monitor performance; troubleshoot hardware/software issues; document configurations and maintenance.

Deploy, operate, and maintain Infoblox IPAM; integrate IPAM with network hardware and broader network environment; administer and troubleshoot DNS, DHCP, NTP, and subnetting for on-prem and cloud; produce technical documentation and support DHS enterprise engineering operations.

Maintain and design LAN/WAN/VPN infrastructure, configure and install network hardware, monitor and analyze network performance, produce documentation, coordinate third-party maintenance, propose cost-optimized solutions, and support network planning and security for on-site 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.

Senior network communications role supporting classified government contracts. Lead design, integration, and migration of large-scale multi-domain networks (SDWAN, ZeroTrust, cloud-enabled), enforce enterprise network standards, provide third-level support, mentor staff, coordinate with customers, and support cyber resilience, audits, and ticketing systems. On-site in Gilbert, AZ; requires Top Secret clearance and occasional travel.

Manage and maintain LAN/WAN/VPN infrastructures; plan, design, configure, and install network hardware; monitor and analyze network performance; prepare documentation; coordinate third-party maintenance; propose cost-optimized solutions; assist with network design and hardware/software selection; lift equipment up to 40 lbs. Must work on-site and comply with clearance and certification requirements.

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.

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.

Designs, implements, and manages enterprise network infrastructure (routers, switches, firewalls, wireless, load balancers) to ensure availability, security, and scalability across multiple sites. Monitors performance, troubleshoots complex issues, enforces security and disaster recovery, leads projects, mentors junior staff, and collaborates with cross-functional teams on network initiatives and documentation.

Maintain and support enterprise Layer 2/3 network infrastructure across multiple sites, including switches, routers, firewalls, VPNs, wireless, cabling and monitoring. Implement changes, manage configurations, troubleshoot complex connectivity and performance issues, perform firmware lifecycle tasks, document standards, and leverage automation to improve reliability and security in an ITAR-regulated aerospace environment.

Provide Tier 2 support and maintenance for a Microsoft-based environment (on-premises and O365 Hybrid). Install, configure, troubleshoot servers, workstations, network devices, backups, SharePoint, Skype for Business, Exchange, SCCM, and support SQL/EHR applications while documenting systems and assisting end users and helpdesk for ~350 users.

Lead design, administration, security, and optimization of LAN/WAN, firewalls, VPNs, wireless, and server environments. Ensure high availability, regulatory compliance (FFIEC/NCUA/GLBA), mentor IT staff, lead infrastructure projects, and manage network monitoring, disaster recovery, and cybersecurity operations.

Tier 2 Network Administrator supporting NOC and operations: troubleshoot break/fix, perform VLAN/ACL/port changes, IOS and firmware upgrades, routing/switching upgrades, provision routers/switches and crypto devices, draft SOPs, conduct root cause analyses, implement STIGs, and support network implementation and site surveys. Works independently and coordinates ticket resolution across teams.

Manage and upgrade enterprise routing and switching infrastructure, perform IOS and firmware upgrades, provision and troubleshoot switches/routers/crypto devices, implement VLANs/ACLs, support network implementation projects, draft SOPs, perform ticket resolution and root cause analysis, and review/apply STIG security guidance.

Manage and maintain LAN/WAN/VPN/wireless infrastructure across multiple sites, secure networks with firewalls and VLANs, troubleshoot Tier 2/3 issues, monitor performance, perform firmware/patch management, document configurations, support site deployments and network projects (SD-WAN, cloud connectivity, automation), and provide vendor coordination and end-user support.

Designs, implements, maintains, and secures enterprise wired and wireless networks using Cisco equipment. Supports WAN/LAN/WLAN/VPN, routing, switching, VLANs, QoS, and Firepower security. Monitors performance, troubleshoots outages, performs packet analysis, and collaborates on infrastructure projects and disaster recovery to ensure high availability for clinical systems.

Administer and maintain a CUI enterprise network and systems under CMMC compliance. Configure and troubleshoot Cisco networking, Cisco ISE, Palo Alto firewalls, Microsoft 365 services, Active Directory, Windows and RHEL endpoints, VPNs, and monitoring tools. Respond to incidents, support patching and endpoint management, document change management, and prepare for audits while collaborating with engineers and operations teams.

Senior Network Administrator responsible for installing, supporting, and maintaining servers, network and telephony infrastructure. Duties include security, backups, patching, monitoring, configuration management, change control, troubleshooting, performance tuning, documentation, disaster recovery, vendor coordination, light scripting, and project management for a trading-floor environment.

Administer and support enterprise and operational network infrastructure for launch operations, including switches, routers, firewalls, VPNs, VLANs, monitoring, troubleshooting, incident response, documentation, and collaboration with cybersecurity and engineering teams during mission-critical and shift-based operations.

Provide Tier 1 network and field support for campus infrastructure: troubleshoot switches, APs, and cabling; perform UPS maintenance; assist senior engineers with firmware updates, NAC administration, wireless surveys, documentation, and change management; support campus construction and equipment installations.

Manage and sustain enterprise network infrastructure including routing, switching, wireless, firewalls, ACLs, VPNs, and segmentation. Implement network security per STIGs/NIST/Zero Trust, support ICAM (Okta, Azure AD), monitor/logging systems, provide Tier III escalation, maintain documentation, and participate in on-call support and infrastructure deployments.

Maintain and monitor enterprise LAN/WAN infrastructure, install and configure routers, switches, firewalls, SD‑WAN and Wi‑Fi devices, support network escalations, manage DNS and server administration, document configurations, and travel to offices for installations and support.

Maintain and troubleshoot classified voice and data network infrastructure onsite, including installation, configuration, monitoring, documentation, and vendor coordination. Support routers, switches, firewalls, encryption, network management tools, and STIG compliance. Perform network analysis, plan upgrades, and provide after-hours support as needed while working in Special Access/classified environments with an active Secret clearance.

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.