Senior Network Administrator – Cisco/Firewall & WAN Expert

Tata Consultancy Services; Adelaide; On-site; AUD 90,000 - 120,000; Full time

Benefits offered by this job

Performance-based incentives

Excellent employee benefits

Recognition programs

Job summary

Tata Consultancy Services in Australia seeks an experienced Network Administrator to oversee enterprise network operations across ANZ. You will manage routers, switches, wireless gear, VPNs, and firewalls, while ensuring high availability and security.

With 8–10 years in enterprise networking and hands-on expertise across Cisco/Meraki, Aruba, Fortinet or Palo Alto, you will monitor performance, lead incident response, and collaborate with vendors to refresh technology and documentation.

Qualifications

• 8+ years of experience in enterprise network operations and administration.
• Hands-on experience with LAN/WAN, Routing, Switching, Wireless, and VPN technologies.
• Experience with Cisco, Meraki, Aruba, Fortinet, Palo Alto, or equivalent networking platforms.
• Strong knowledge of TCP/IP, DNS, DHCP, VLAN, STP, OSPF, BGP, and network security concepts.
• Experience with firewalls, VPNs, NAC, and network access policies.
• Knowledge of network monitoring tools such as SolarWinds, PRTG, Nagios, Zabbix, or equivalent.
• Strong troubleshooting skills for connectivity, performance, latency, routing, and wireless issues.
• Experience in ITIL processes, including Incident, Problem, Change, and Major Incident Management.

Responsibilities

• Manage and administer enterprise network infrastructure across Australia and New Zealand locations.
• Configure and maintain routers, switches, wireless controllers, and access points.
• Monitor network health, performance, utilization, and availability.
• Troubleshoot LAN, WAN, Wi‑Fi, VPN, and Internet connectivity issues.
• Manage firewall policies, VPN tunnels, and network security controls.
• Provide L2/L3 support for critical incidents and service requests.
• Coordinate with ISPs, telecom providers, and OEM vendors for circuit and hardware issues.
• Support network upgrades, migrations, patching, and technology refresh initiatives.
• Participate in RCA preparation and implement preventive actions.
• Maintain network documentation, topology diagrams, SOPs, and operational runbooks.

Skills

Routing & Switching

Cisco/Meraki

Wireless

VPN

Firewall

Network Monitoring

Incident Management

Tools

SolarWinds

PRTG

Nagios

Zabbix

Job description

Tata Consultancy Services in Australia seeks an experienced Network Administrator to oversee enterprise network operations across ANZ. You will manage routers, switches, wireless gear, VPNs, and firewalls, while ensuring high availability and security.

With 8–10 years in enterprise networking and hands-on expertise across Cisco/Meraki, Aruba, Fortinet or Palo Alto, you will monitor performance, lead incident response, and collaborate with vendors to refresh technology and documentation.