Senior Network Security Engineer — On-Call Incident Lead

DEFEND; Christchurch; Hybrid; NZD 120,000 - 180,000; Full time

Benefits offered by this job

3.5% KiwiSaver on top of base salary

Southern Cross Health Insurance

Mobile and Broadband discounts

Flexible, hybrid work environment

Home office setup allowance

Access to EAP services

Job summary

DEFEND is seeking a Senior Network Security Operations Engineer in Christchurch, NZ. You will lead response to complex faults, mentor juniors, and own incidents end-to-end in a 24/7 on-call rotation.

As a hands-on technical leader, you will apply deep networking and security expertise, drive improvements, document procedures, and ensure secure, resilient delivery of network security services for our customers.

Qualifications

• Comprehensive knowledge of networking and network security principles.
• Experience in incident response, troubleshooting and fault resolution.
• Experience in network operations and support with leadership capabilities.
• Collaborative mindset with teamwork, mentoring, and capability development.
• Excellent written and verbal communication skills.
• Strong time management and prioritization under pressure.
• Excellent documentation skills including procedures and network diagrams.
• Ability to work independently with sound technical judgement.

Responsibilities

• Lead, deliver, and support technical solutions to customers.
• Provide mentorship and guidance to junior team members.
• Perform incident investigations and analyze impact and severity.
• Diagnose complex faults and drive effective resolution.
• Identify risks and opportunities for security improvements.
• Ensure changes follow established change management practices.
• Provide technical leadership for secure, reliable network delivery.
• Participate in a 24/7 on-call rotation for rapid response.

Skills

Network security expertise

Incident response leadership

Troubleshooting & fault resolution

Mentoring junior engineers

Documentation & diagramming

On-call experience

Tools

Firewall administration

Network monitoring tools

Job description

DEFEND is seeking a Senior Network Security Operations Engineer in Christchurch, NZ. You will lead response to complex faults, mentor juniors, and own incidents end-to-end in a 24/7 on-call rotation.

As a hands-on technical leader, you will apply deep networking and security expertise, drive improvements, document procedures, and ensure secure, resilient delivery of network security services for our customers.