Top Network Administrator Jobs

The Systems/Network Administrator provides IT systems support, troubleshooting, and maintenance. Responsibilities include managing daily operations, user assistance, problem resolution, and optimizing systems. Requires experience in configuring systems and network components, and supporting IT environments.

Maintain and troubleshoot corporate networks: configure switches/routers/firewalls/access points, support LAN/WAN and VoIP, handle tickets, coordinate vendors, participate in projects, and be on-call.

Provide onsite systems and network administration: deploy and troubleshoot Windows desktops/laptops, manage VMware infrastructure (vCenter/ESXi/vSAN), maintain Active Directory/Azure AD/GPO, support backups (Nakivo), patch Windows/Linux, configure network switches and VLANs, and manage Intune and Bitdefender AV.

Manage and troubleshoot LAN/WAN networks, deploy and optimize network configurations, monitor performance with tools like SolarWinds and Cisco Prime, and perform 2nd/3rd-level infrastructure support. Design and audit network/security, maintain documentation, support disaster recovery planning, and recommend upgrades. Provide staff guidance and continuous improvements to ensure network availability and data integrity.

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.

Administer and maintain the school's network, servers, endpoints, MDM, and cloud identity services. Troubleshoot infrastructure and classroom technology, support AV and printers, assist with cybersecurity, backups, disaster recovery, and participate in technology projects and planning.

Senior Network Administrator responsible for server, network, and data center performance, security, and reliability. Install, configure, and maintain switches, routers, firewalls, cabling, servers, OSes, web/app servers, and directory services. Troubleshoot incidents, apply patches/upgrades, support OT/SCADA as needed, and collaborate with IT leadership on security and planning.

Support, maintain, troubleshoot, and optimize enterprise network infrastructure. Configure routers, switches, firewalls, VPNs; monitor performance and security; respond to incidents; participate in maintenance, upgrades, on-call rotations, and client-facing technical support while documenting configurations and collaborating with cloud, security, and support teams.

Lead design, implementation, monitoring, reporting and maintenance of network and telephony infrastructure. Manage and provide technical leadership to a team of network engineers/administrators. Perform hands-on Cisco router/switch/firewall/VoIP configuration, routing protocols (EIGRP/OSPF/BGP), VPN/MPLS, QoS, wireless, NetFlow analysis, network security (IPsec/SSL/IDS/IPS), and documentation using Microsoft Office. Korean bilingual required. PM roles require ~8 years of team leadership.

The Network Administrator manages networks, troubleshoots issues, coordinates with vendors, and oversees systems projects and policy discussions within DoD information systems.

The IT Infrastructure Engineer will design and support IT infrastructure across sites, manage network environments, and mentor junior staff. Requires extensive experience with Microsoft 365, Azure, and network security technologies.

Design, implement, and maintain enterprise network and server infrastructures across on‑prem and cloud (AWS/Azure/HCI). Administer Azure Entra and M365, virtualized environments (VMware/Hyper‑V), automate tasks with scripting, troubleshoot network/security issues, document configurations, and provide technical leadership and cross‑functional support.

Manage and secure enterprise networks by configuring routers, switches, and firewalls; apply STIGs; support COMSEC key management and crypto devices; troubleshoot networks; maintain secure baselines and detailed COMSEC records; act as DISN COMSEC liaison to NSA; produce DISN COMSEC reports. Onsite at FMD; Secret clearance required.

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.

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.

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.

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.

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.