Senior Network Security Architect — Fortinet & Check Point

Optus Enterprise; Sydney; Hybrid; AUD 150,000 - 190,000; Full time

Job summary

Optus Enterprise is seeking a senior network security expert based in Macquarie Park, Sydney, to design, govern and manage secure network architectures. You will drive security improvements, mentor teams and support risk assessment and incident response.

Hands-on firewall design and migration are essential to this role. With 8+ years in telecoms or large enterprises and strong Fortinet/Check Point experience, you will translate requirements into secure solutions, while guiding cross-functional

Qualifications

• Degree in Telecommunications Engineering (or related field) or equivalent experience.
• At least 8 years' experience in telecommunications or large enterprise environments with Fortinet and Check Point expertise.
• Solid understanding of operational processes, fault management, and diagnosing customer issues.
• Proven ability to manage major faults across multiple platforms and communicate with senior stakeholders (GM level).
• Experience in testing/PoC environments, including methodologies and platform limitations.
• Background in large-scale network design and implementation; scripting skills (Python, Perl) are an advantage.

Responsibilities

• Lead PIR and rep CSE across all problem management engagements.
• Design, implement, and maintain firewall solutions using Fortinet and Check Point platforms.
• Provide Tier-3 technical support to resolve complex network security incidents.
• Translate business, security, and network requirements into scalable firewall designs.
• Deliver firewall migrations, upgrades, policy optimisation, and high-availability implementations.
• Apply routing and switching knowledge to interpret network architectures and security traffic flows.
• Collaborate with Network, Cyber Security, and Operations teams to ensure secure end-to-end designs.
• Perform security assessments, troubleshooting, and root-cause analysis for firewall and VPN services.
• Contribute basic scripting and automation to improve operational efficiency and repeatability.
• Ensure designs align with security standards, best practices, and lifecycle requirements.

Skills

Fortinet firewalls

Check Point firewalls

Python scripting

Stakeholder engagement

Education

Degree in Telecommunications Engineering or related field

Tools

Fortinet

Check Point

Python

Perl

Job description

Optus Enterprise is seeking a senior network security expert based in Macquarie Park, Sydney, to design, govern and manage secure network architectures. You will drive security improvements, mentor teams and support risk assessment and incident response.

Hands-on firewall design and migration are essential to this role. With 8+ years in telecoms or large enterprises and strong Fortinet/Check Point experience, you will translate requirements into secure solutions, while guiding cross-functional