Top Network Administrator Jobs

Provide Tier II and Tier IV system and network monitoring, build and modify BSM and Node Manager views/topologies, manage SNMP configurations and site-specific monitoring, monitor and resolve Remedy incidents, manage operator access and critical alerts, and troubleshoot regional systems and assets.

Designs, implements, and supports network and server infrastructure. Manages network devices, patches, firmware, capacity planning, virtualization (VMWare), Windows and Linux servers, security updates, and vendor/system access. Monitors network health, documents changes, partners with teams on IT projects, and maintains compliance and operational reliability.

Manage, design, implement, administer, and troubleshoot enterprise network infrastructure (routers, switches, firewalls, load balancers, wireless). Configure VPNs, routing (BGP/OSPF), MPLS, and support transport protocols and services. Coordinate projects, perform requirements/specifications, and travel for consulting engagements.

Design, implement, and operate Semtech's global network across 30+ sites. Support LAN/WAN, firewalls, SD-WAN, cloud networking (AWS/Azure), VPNs, automation, and lifecycle maintenance. Collaborate with infrastructure, security, and engineering teams to ensure network resilience, performance, and security while leading strategic initiatives like zero-trust and VPN modernization.

Manage and maintain CRC Americas server, network, virtualization, storage, and voice environments. Administer Windows, AD/GPO, Exchange, O365, VMware, Cisco networking and VoIP; perform monitoring, backups, security filtering, troubleshooting, reporting, documentation, help-desk escalation, automation, and participate in after-hours support and infrastructure projects.

Provide day-to-day administration, monitoring, and security operations for classified DoD networks (Collateral, SCI, SAP). Lead IT ops team, manage SIEM and monitoring tools, perform vulnerability and security assessments, implement RMF/JSIG controls, build SOPs/O&M checklists, support incident response, and maintain virtualization, server, and networking environments.

The System/Network Administrator manages server and client administration, maintains network hardware, troubleshoots issues, and oversees IT infrastructure projects.

The Network Systems Admin will support application teams with infrastructure tasks, including change deployments, incident resolution, and event monitoring.

The Network Systems Admin will support app teams in change and code deployments, incident resolution, and event monitoring requiring communication skills and system administration expertise.

Provide day-to-day administration and support of secure MS Windows networks within DoD Special Access Programs (SAP/SCI). Maintain servers, firewalls, backups, security monitoring, and network protocols; troubleshoot anomalies; perform maintenance and firmware updates; support A&A and RMF activities; interface with customers and attend planning meetings; support operational tests and provide technical guidance.

Manage Development, QA, and Production environments for ODS/data warehouse/data mart solutions. Perform ETL design, deployments, Informatica administration, patching, load monitoring/recovery, performance tuning, and coordinate with offshore teams and vendors.

The Network/Systems Administrator will maintain data security, track network requests, provide communication to customers, log contacts, and report activities.

Design, deploy, secure, and sustain classified and unclassified network infrastructure. Manage Palo Alto firewalls and Aruba networking, implement zero-trust segmentation, ensure DoD compliance (RMF/STIGs), support incident response and vulnerability remediation, and collaborate with cybersecurity and DevOps teams to maintain high availability and accreditation readiness.