Senior Network Security Engineer – Sydney

• Senior Network Security Engineer – HFT - Sydney
• Westbury Partners – Sydney NSW
• Full time

Drive network security and cyber resilience across global hybrid environments, combining hands-on engineering, security operations, automation, and threat response to protect critical infrastructure and data.

What You'll Do

Join a high-performing global security team where you’ll help shape and strengthen the organisation’s cyber defence capabilities.

You’ll work across network security, cloud, security operations, and emerging technologies, tackling complex challenges while helping build secure, scalable, and resilient environments.

Your responsibilities will include

• Operate and maintain enterprise security technologies including firewalls, SASE, CASB, proxies, NAC, and cloud security controls .
• Provide hands-on support for security platforms within a global 24/7 follow-the-sun operating model , including rotational weekend coverage.
• Investigate and resolve complex security and network issues, taking ownership from identification through to resolution.
• Monitor and analyse security logs, alerts, vulnerabilities, and network traffic to identify and mitigate threats.
• Support network security architecture, including segmentation, encryption, secure remote access, and L7 security controls .
• Implement automated, scalable security solutions across hybrid, multi-cloud, and on-premises environments .
• Collaborate with IT, cloud, infrastructure, and engineering teams to embed security into technology and operational practices.
• Help design, implement, and enforce security policies, controls, and best practices.
• Use tools such as Wireshark and tcpdump for packet analysis and advanced troubleshooting.
• Contribute to vulnerability management, identity controls, endpoint protection, threat detection, and intrusion prevention.
• Apply an adversarial mindset to identify emerging threats and strengthen defensive capabilities.
• Lead projects, influence architectural decisions, and mentor less experienced team members.

Why Join Us

This is an opportunity to make a genuine impact on the security landscape of a sophisticated, technology-led organisation.

You’ll work with a broad range of modern security technologies, influence architectural direction, and solve challenging problems alongside talented colleagues across the globe.

The role offers significant exposure to network security and security operations , with opportunities to continuously expand your technical expertise, introduce automation, improve processes, and develop innovative approaches to cyber resilience.

About You

You’re a curious, technically minded security professional who enjoys getting hands-on with complex problems.

You bring strong foundations in networking, security engineering, operating systems, cloud technologies, and security operations , alongside a genuine appetite for continuous learning.

You’ll ideally have

• 5+ years of experience in network engineering and/or security, with opportunities available for less-experienced candidates at junior level.
• Strong multi-vendor firewall experience and knowledge of modern network security technologies.
• Solid understanding of networking protocols and security principles across multiple layers.
• Experience safeguarding networks, systems, data, and critical assets.
• Practical knowledge of security monitoring, threat detection, vulnerability management, identity, endpoint security, and intrusion prevention/detection.
• Experience with packet capture and analysis using Wireshark, tcpdump , or similar tools.
• An understanding of offensive security and adversary techniques.
• Programming experience in a high-level language.
• Strong analytical, troubleshooting, communication, and collaboration skills.
• A clear sense of ownership and determination to see issues through to resolution.
• A humble, adaptable, reliable, and collaborative approach to working with global teams.
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