Top Network Administrator Jobs

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.

The IT Network Administrator manages enterprise network infrastructure, provides user support, troubleshoots issues, and ensures security and reliability.

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.

Operate and maintain global LAN/WAN for USSOCOM and deployed forces: monitor networks, troubleshoot and escalate issues, manage IDS/firewalls/VPNs, document configurations and inventories, perform upgrades, create monitoring reports, and support engineering and project work.

Design, implement, maintain, and secure Tessera's enterprise network infrastructure. Provide advanced technical support, manage network devices and security solutions, monitor performance, ensure capacity planning and CMMC compliance, participate in vendor and project management, and support remote office connectivity and Help Desk escalations.

Administer and support servers, Microsoft 365, identity management, and cloud services. Troubleshoot complex system, application, network, and security issues. Manage user accounts, deploy hardware and software, maintain backups and disaster recovery, document IT assets, and coordinate vendors and projects from planning through deployment.

Maintain, configure, and troubleshoot network and server infrastructure (LAN/WAN, firewalls, VPNs, Windows/Linux, virtualization, cloud). Lead remediation, mentor support staff, implement business continuity, respond to outages 24/7, assist Network Architects on projects, and document systems and incidents.

Manage and optimize servers, desktops/laptops, network infrastructure (routers, switches, firewalls, WiFi, VPN), Active Directory, WSUS, antivirus, backups and NAS. Administer Cisco telephony (CUCM, UCCX, WxC), GPOs, and MS Visio documentation. Provide top-level support, collaborate on security and infrastructure projects, assist IT director, and participate in on-call/after-hours support.

Hands-on network administrator responsible for designing, deploying, monitoring, and securing LAN/WAN/VPN/wireless/cloud networks. Troubleshoots firewalls and VPNs, performs root-cause analysis, administers WatchGuard firewalls, and operates/tunes Rapid7 InsightIDR including agent deployment and log ingestion to investigate and remediate security incidents.

Manage client network infrastructure, provide technical support, recommend improvements, assist project management, and offer end-user training.

Provide onsite Tier 2 network and desktop support for a government customer in Washington, DC. Install, configure, and maintain LAN equipment, servers, storage and backups; troubleshoot hardware, software, network, VTC, mobile and attached devices; manage tickets in ServiceNow; perform cabling, deployments, inventory, reporting, and occasional after-hours or travel support. Requires Public Trust clearance and customer-facing work in law enforcement environments.

Administer, secure, and maintain enterprise network infrastructure (routing, switching, wireless, storage networking, Cisco ACI). Provide Tier II/III support, troubleshoot performance and availability, perform capacity planning, support disaster recovery, maintain documentation, and ensure compliance with DoD cybersecurity requirements.

Lead planning, design, implementation, monitoring and maintenance of network and telephony infrastructure. Provide technical leadership and manage a team of network engineers/administrators. Configure and optimize Cisco LAN/WAN/WLAN, routing protocols, VPN/MPLS, security (firewalls, IDS/IPS), VoIP/Unified Communications, and cabling standards. Troubleshoot performance with packet analysis and NetFlow and document solutions.

Plan, design, implement, monitor, report and maintain network and telephony infrastructure. Provide technical leadership and manage a team of network engineers/administrators. Hands-on work configuring Cisco routers, switches, firewalls, VPN/MPLS, routing protocols, wireless controllers, VoIP/Unified Communications, QoS, NetFlow, and network security. Produce documentation and collaborate with facilities for cabling and infrastructure standards.

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 support multi-site IT infrastructure including WAN, Layer 3 switching, VPNs, firewalls, and wireless. Administer G-Cloud and on-prem servers (AD, DHCP, MECM), oversee network security solutions (UTM, Zscaler, NAC, IPS), and support IT infrastructure/security projects while coordinating with local and remote teams and AWS headquarters. Korean bilingual required; on-site Atlanta presence and multi-location support expected.

Manage daily WAN/LAN and server operations, troubleshoot Cisco/Juniper equipment, and lead infrastructure projects from design through implementation, vendor coordination, and post-implementation support.

As a Senior Network Administrator, you will ensure network security and compliance, manage network operations, and support mission-critical communications across the Pacific theater.

Administer and maintain Windows/Linux servers, networking, virtualization, and Azure cloud infrastructure. Manage Active Directory, DNS, DHCP, Group Policy, VPNs, firewalls, SAN/NAS, backups, monitoring, patching, and disaster recovery. Provide high-level escalation support, perform controlled changes, maintain documentation, and collaborate with teams and vendors to improve infrastructure security, performance, and reliability. On-call and after-hours work required.

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.

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.

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 hands-on network and desktop administration for an enterprise application suite: install and configure network/desktop hardware and software, maintain standards and security, manage cloud and virtualization, implement backup strategies, monitor performance, troubleshoot issues, support release management, document infrastructure, and collaborate with development and stakeholders.

Ensure reliable network operations by monitoring performance, coordinating maintenance, troubleshooting production and new infrastructure, architecting and implementing network solutions, and collaborating with infrastructure and application teams.