Network Administrator

Jobtailor; Irvine (CA); On-site; USD 90,000 - 130,000; Full time

Job summary

Jobtailor is seeking an experienced Network Infrastructure Engineer to administer, monitor, and maintain enterprise network across multiple sites in Southern California. You will manage routers, switches, firewalls, wireless APs, and SD-WAN, ensuring high availability and performance.

You will work with IT security, incident response, and disaster recovery planning, coordinate with carriers, and document configurations, IPAM, and change logs while supporting on-call rotations.

Qualifications

• Bachelor's degree in Information Technology, Computer Science, Network Engineering, or a related field desired.
• Associate's degree with equivalent work experience may be considered.
• 3+ years of hands‑on experience in network administration or a related infrastructure role within an enterprise environment.
• Experience managing multi‑site WAN environments including carrier circuit management and telecom coordination.

Responsibilities

• Administer, monitor, and maintain enterprise network infrastructure including routers, switches, firewalls, wireless access points, and SD-WAN across all organizational sites.
• Ensure network availability, performance, and reliability through proactive monitoring, capacity planning, and timely troubleshooting of issues.
• Configure and manage network security controls including firewalls, VPNs, ACLs, and network segmentation in alignment with organizational security policies.
• Support WAN connectivity and telecommunications infrastructure, including carrier circuit management and service provider coordination.
• Assist in the design and implementation of network upgrades, expansions, and technology refresh initiatives as directed by the Director of Infrastructure & Operations.
• Maintain accurate and up-to-date network documentation including diagrams, configurations, IP address management (IPAM), and change logs.
• Respond to and resolve network-related incidents and service requests within defined SLAs; expand complex issues as appropriate.
• Collaborate with the cybersecurity team to support network security initiatives, vulnerability remediation, and compliance requirements.
• Participate in on‑call rotation to provide after‑hours support for critical network incidents and outages.
• Support disaster recovery and business continuity efforts related to network infrastructure, including DR testing and failover procedures.

Skills

Network administration

WAN management

Network security controls

Incident management

ITIL processes

Documentation

Education

Bachelor's degree in IT/CS/Networking

Associate's degree with equivalent experience

Tools

Azure Virtual Network

ExpressRoute

SD-WAN technologies

Job description

Responsibilities

• Administer, monitor, and maintain enterprise network infrastructure including routers, switches, firewalls, wireless access points, and SD-WAN across all organizational sites
• Ensure network availability, performance, and reliability through proactive monitoring, capacity planning, and timely troubleshooting of issues
• Configure and manage network security controls including firewalls, VPNs, ACLs, and network segmentation in alignment with organizational security policies
• Support WAN connectivity and telecommunications infrastructure, including carrier circuit management and service provider coordination
• Assist in the design and implementation of network upgrades, expansions, and technology refresh initiatives as directed by the Director of Infrastructure & Operations
• Maintain accurate and up-to-date network documentation including diagrams, configurations, IP address management (IPAM), and change logs
• Respond to and resolve network-related incidents and service requests within defined SLAs; expand complex issues as appropriate
• Collaborate with the cybersecurity team to support network security initiatives, vulnerability remediation, and compliance requirements
• Participate in on‑call rotation to provide after‑hours support for critical network incidents and outages
• Support disaster recovery and business continuity efforts related to network infrastructure, including DR testing and failover procedures

Requirements

• 3+ years of hands‑on experience in network administration or a related infrastructure role within an enterprise environment
• Experience managing multi‑site WAN environments including carrier circuit management and telecom coordination
• Experience with SD‑WAN technologies and cloud networking concepts (Azure Virtual Network, ExpressRoute, or equivalent) preferred
• Familiarity with ITIL‑based change management and incident management processes
• Preferred certifications: Cisco CCNA or CCNP, CompTIA Network+, Fortinet NSE, or equivalent vendor certifications
• Bachelor's degree in Information Technology, Computer Science, Network Engineering, or a related field desired
• Associate's degree with equivalent work experience may be considered.

Core Competencies

Demonstrates expertise in administering and maintaining enterprise network infrastructure, including routers, switches, firewalls, and SD‑WAN technologies. Proficient in network security management, incident response, and compliance with organizational policies.