Top Network Administrator Jobs

Provide day-to-day administration and support of LAN/WAN, servers, hypervisors, and enterprise security tools for Collateral, SCI and SAP environments. Manage COTS/GOTS tools, operate SIEMs, create SOPs/TTPs, participate in incident response, perform vulnerability/forensic analysis, and support RMF/compliance activities for DoD customers.

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.

Provide day-to-day administration, installation, and support for LAN/WAN and networked systems within SAP/DoD environments. Participate in architecture, operations, SIEM monitoring, incident response, vulnerability scanning, and O&M checklist development. Manage COTS/GOTS security products, hypervisors, Windows and RHEL servers, databases and web servers, and support classified collateral, SCI, and SAP activities under TS/SCI clearance.

Support, maintain, and optimize DeltaV control systems and associated network/server infrastructure. Design and test network architectures, perform configuration management, cybersecurity assessments, system patching, virtualization and backup/recovery tasks, troubleshoot hardware/software and network issues, and produce clear technical documentation while supporting customer projects and emergency service requests.

The Network & Systems Administrator supports and maintains network infrastructure and core enterprise systems, ensuring their health and availability while managing various IT services and mentoring junior team members.

The role involves supporting network applications, maintaining databases, and providing administration for various technologies while ensuring integration and support for the Gold Comet ecosystem.

The role involves the implementation, administration, and troubleshooting of various CA products and SQL Server, along with Windows and Unix/Linux systems management.

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.

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.

Operate and maintain Collateral, SCI, and SAP IT environments: manage servers, virtualization, networking, SIEM and vulnerability tools, support incident response, apply RMF/Common Criteria, perform scripting/automation, and provide customer-facing technical support for enterprise Windows and Linux systems.

Administer and troubleshoot VMware Cloud Foundation environments (vSphere, NSX, vSAN) including patching via SDDC Manager, VM migrations, vulnerability remediation, backups/restores, system monitoring, and documenting changes. Provide root-cause analysis, support test environments for a government customer, and brief stakeholders. Perform NSX networking tasks (routing, distributed firewall, NAT, load balancing, micro-segmentation) and ensure DoD compliance.

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.

Provide Tier 2-3 Unix/Linux systems administration and troubleshooting for large-scale OSS environments. Ensure system availability and uptime, enforce security policies, manage privileged accounts, collaborate with clients and operational teams, create/update documentation and WLAs, and support a 24/7 on-call rotation with potential off-hours work.

Provide day-to-day administration, installation, and support of LAN/WAN, servers, virtualization, and security tools for DoD/SAP environments. Maintain Windows and RHEL systems, configure networking and virtualization, operate SIEM and monitoring tools, follow RMF and DoD policies, assist incident response, and support PL2/SAP operations.

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.

Maintain and secure enterprise network infrastructure (LAN/WAN/VPN/DMVPN/data center), troubleshoot incidents and outages, manage lifecycle of networking hardware, implement cybersecurity controls, use monitoring tools to optimize availability and performance, document standards and follow change control and compliance practices. Provide after-hours support and coordinate with IT and operations teams.

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.

Serve as the primary administrator and SME for OpenText Network Automation and enterprise network management. Manage platform performance, upgrades, integrations, patching, and lifecycle. Lead network configuration compliance, enforce baselines and security policies, monitor/remediate drift, develop automation and workflows (Python), integrate with enterprise tools, produce documentation/audit evidence, and support second-shift operations.

Manage and maintain DRTS network servers, workstations, and IT assets for live-fire training ranges. Provide SME-level operational support, security controls, troubleshooting, inventories, documentation, staff training, and coordinate with Range Manager and government personnel. Ensure preventive maintenance, reports, and compliance with DoD IA certification requirements.

Provide 24x7 onsite operational support for classified enterprise and mission networks. Monitor systems, respond to outages, perform break/fix, patching, configuration management, and troubleshoot server and network issues. Maintain security baselines (DISA STIGs), document incidents, and coordinate maintenance with engineering teams.

Provide frontline IT support: manage help desk tickets; install, configure, troubleshoot, and upgrade Windows desktops, laptops, printers; administer Microsoft 365 and Teams; monitor backups and assist recovery testing; maintain IT inventory and documentation; submit purchase orders; participate in on-call and after-hours support.