Top Network Administrator Jobs

Own and improve enterprise network segments: deploy and upgrade network infrastructure, tune performance, resolve complex incidents, automate operational tasks, validate SLAs/security, manage vendors, maintain documentation, and mentor junior staff.

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.

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.

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.

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.

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.

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.

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.

Administer and modernize Windows server and Active Directory environments, manage multi-site WAN and network infrastructure (Meraki, UniFi, Fortinet), improve security and patching, support backup/DR, develop PowerShell automation, document runbooks, mentor helpdesk, and lead infrastructure remediation and segmentation projects.

Maintain and troubleshoot voice and data networks, administer telephone systems, perform backups and disaster recovery, manage hardware/software inventory, assist with WAN, VPN, firewalls and security, support server infrastructure, document systems, and provide emergency coverage as assigned.

Install, maintain, and administer WAN/LAN network infrastructure; provide 2nd/3rd-level support; assist with firewall, RF, authentication, and load balancer tasks; manage network monitoring, document changes, and participate in on-call rotation.

Administer, secure, and maintain enterprise network infrastructure (routing, switching, wireless, storage networking, Cisco ACI). Provide Tier II/III support, monitor performance, troubleshoot connectivity, assist disaster recovery, manage vendor lifecycles, and ensure compliance with DoD cybersecurity requirements.

Provide on-site Tier III network, server, virtualization, and data center support to maintain >99.9% availability. Lead data center operations, administer physical and virtual infrastructure (VMware, EMC SAN), perform system administration, patching, recovery, troubleshooting, and document security incidents. Mentor junior staff and coordinate with Government personnel for complex issue resolution in a DoD environment.

Operate and maintain bank network infrastructure including incident response, moves/adds/changes, equipment installation/de-installation, capacity planning, switch/port and bandwidth monitoring, backup power verification, documentation, disaster recovery validation, and periodic travel to branch locations to support buildouts and troubleshoot network and phone circuits.

Manage and maintain on-site networks, servers, endpoints, and security across multiple dealership locations. Provide Tier 2/3 support, mentor junior IT staff, create documentation and repeatable processes, proactively monitor infrastructure, and lead projects to improve reliability and standardization.

Configure, maintain, and troubleshoot network devices (switches, routers, firewalls, load balancers) on JWICS. Implement security controls, perform routine maintenance, manage change/configuration documentation, support network architecture upgrades, and provide Linux/Windows system administration and coordination with external partners.

Support and maintain Army enterprise network environments including routers, firewalls, and load balancers. Perform mid-level administration, monitoring, configuration, troubleshooting, incident response, boundary security maintenance, and compliance with DISA STIGs and RMF. Collaborate with mission partners in a 24/7/365 operational environment and support automation, documentation, and cybersecurity requirements.

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.

Serve as senior network administrator and alternate team lead for Army enterprise networks. Provide administration, monitoring, configuration, troubleshooting, incident response, boundary protection, and automation improvements for routers, firewalls, load balancers, and JRSS in a 24/7 mission environment. Mentor junior staff, maintain technical documentation, ensure compliance with DISA STIGs/RMF/ACAS, and collaborate with mission partners.

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.

Design, deploy, and maintain enterprise LAN/WAN networks across Fortinet, Cisco Meraki, and Juniper platforms. Lead implementations, upgrades, SD-WAN, HA firewall clusters, VLANs, and secure zoning. Configure BGP/OSPF, IPSec/SSL VPNs, Azure network connectivity, IDS/IPS, and VoIP (SIP/QoS). Perform packet-level troubleshooting, produce KPI reports, and maintain detailed network documentation while driving performance tuning and root-cause remediation.

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.