Network Administrator

NTT DATA, Inc.; Sydney; On-site; AUD 70,000 - 110,000; Full time

Job summary

NTT DATA, Inc. is seeking an experienced Network Administrator for a 3-month contract based in Sydney CBD. The role focuses on maintaining and securing complex enterprise networks, delivering reliable connectivity, and supporting ongoing infrastructure upgrades.

The successful candidate will have hands-on experience with Cisco, Arista, Palo Alto, and VPN solutions, with a track record of high availability and strong troubleshooting skills in a fast-paced environment.

Qualifications

• Strong hands-on experience with enterprise network infrastructure and security.
• Experience designing and implementing secure, scalable network solutions.
• Proven ability to troubleshoot complex network incidents and outages.

Responsibilities

• Administer and support enterprise network and communications infrastructure.
• Monitor network performance, availability, and capacity.
• Troubleshoot and resolve network incidents and outages.
• Manage network security platforms and connectivity services.
• Design and implement scalable, secure network solutions.
• Support infrastructure upgrade and refresh projects.
• Coordinate with internal stakeholders and technology vendors.
• Drive continuous improvement and operational excellence.

Skills

Cisco Catalyst & Nexus

Arista Switching

Cisco Wireless Controllers

Palo Alto Firewalls

GlobalProtect VPN

Certificate Management / PKI

Network Monitoring

Security Operations

High Availability

Troubleshooting

Job description

Network Administrator | 3-Month Contract | Sydney CBD

3-Month Contract with potential extension

We are seeking an experienced Network Administrator to join a high-performing technology team supporting a complex enterprise environment.

This is a hands-on role requiring strong expertise across networking, security, wireless, and communications infrastructure. You'll be responsible for maintaining critical systems, troubleshooting complex issues, implementing network improvements, and ensuring the reliability and security of enterprise services.

Key Responsibilities

• Administer and support enterprise network and communications infrastructure.
• Monitor network performance, availability, and capacity.
• Troubleshoot and resolve network incidents and outages.
• Manage network security platforms and connectivity services.
• Design and implement scalable, secure network solutions.
• Support infrastructure upgrade and refresh projects.
• Work closely with internal stakeholders and technology vendors.
• Contribute to continuous improvement initiatives and operational excellence.

Required Technical Skills

• Cisco Catalyst & Nexus Switches
• Arista Switching Technologies
• Cisco Wireless Controllers
• Palo Alto Firewalls (Physical & Virtual)
• GlobalProtect VPN
• Certificate Management / PKI
• Network Monitoring & Troubleshooting
• Network Security & Infrastructure Operations
• Experience as a Network Administrator in a complex enterprise environment.
• Strong hands-on experience with network infrastructure, security, and communications technologies.
• Proven experience supporting high-availability environments.
• Strong understanding of networking principles and security best practices.
• Excellent troubleshooting and problem-solving skills.
• Ability to communicate effectively with both technical and non-technical stakeholders.
• Experience managing multiple priorities in a fast-paced environment.