Senior Network Security Engineer

Aurizon; City of Brisbane; On-site; AUD 120,000 - 150,000; Full time

Benefits offered by this job

Development opportunities

Mentoring programs

Health insurance discounts

Parental leave program

Job summary

Aurizon is seeking a Senior Network Security Engineer to support network security infrastructure. You’ll design and maintain secure connectivity solutions to protect critical systems from cyber threats.

This role requires extensive collaboration within the security team to deliver compliant network services. Candidates should have a strong background in network security, relevant certifications, and experience with VPNs and firewalls.

Qualifications

• 7+ years’ experience in network security roles within large enterprise environments.
• Deep expertise in designing and managing next-generation firewalls.
• Strong working knowledge of Azure networking and VPN gateway configuration.

Responsibilities

• Design, implement, and maintain secure, scalable connectivity solutions.
• Perform system administration and maintenance of network security infrastructure.
• Respond to security incidents and support remediation activities.

Skills

Network Security

VPNs

Firewalls

Cisco

Azure Networking

Scripting

Stakeholder Management

Education

Tertiary qualification in IT, Networking, Engineering

CISSP/CCNP/CCIE certification

Tools

Palo Alto

CheckPoint

F5

Meraki

PowerShell

Python

Job description

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Remuneration/Benefit: Negotiable with yearly bonus

About the role: We’re seeking an experienced and technically strong Senior Network Security Engineer to support network security infrastructure. You’ll be responsible for designing, implementing, and maintaining secure, scalable connectivity solutions across our enterprise, helping ensure that critical systems and users remain protected from cyber threats—without compromising performance.

This is a key role within a growing cyber function, working closely with Aurizon’s secure connectivity principal, cloud, server, and other security teams to deliver highly available, compliant, and secure network services.

• Build, Design and Manage secure connectivity solutions including VPNs, firewalls, cloud gateways, and application delivery technologies.
• Perform system administration and maintenance of connectivity platforms and network security infrastructure.
• Implement and manage security protocols, vulnerability assessments, and continuous monitoring across all connectivity services.
• Deliver internal and external connectivity services in line with SLAs and IT Service Management frameworks.
• Create and maintain network and platform roadmaps to support business evolution.
• Lead the development and testing of Disaster Recovery (DR) plans for connectivity solutions.
• Maintain comprehensive documentation including architecture diagrams, configurations, and procedures.
• Ensure compliance with internal policies and external regulatory requirements.
• Provide user training and support on secure connectivity practices.
• Partner with technical teams to ensure efficient and secure integrations across cloud and on-prem environments.
• Respond to security incidents, maintain incident readiness tools, and support remediation activities.
• Participate in post-incident reviews and implement improvements to harden infrastructure.
• Fulfil on-call responsibilities as part of a rotating team roster.
  

About you:

• Tertiary qualification in IT, Networking, Engineering, or a related field (mandatory).
• One or more relevant certificates, such as CISSP, CCNP, CCIE, Azure Network Engineer Associate, or vendor certificates in Palo Alto, CheckPoint, F5, or Cisco (mandatory).
• 7+ years’ experience in network security roles within large enterprise environments.
• Deep expertise in designing and managing next-generation firewalls and secure networking solutions.
• Advanced skills in Cisco switching/routing and Meraki technologies.
• Strong working knowledge of Azure networking, API security, and VPN gateway configuration.
• Solid scripting experience (PowerShell, Python, iRule) to support automation and integration.
• Excellent communication skills with a strong ability to work across teams and manage stakeholder expectations.
• Familiarity with MITRE ATT&CK, deception technologies, and secure administration across Windows/Linux/Azure environments (preferred).
  

What we offer you:

At Aurizon, we support the development and growth of our employees. With a national portfolio of operations, we offer long-term and exciting career opportunities.

Some of our benefits include:

• Development and growth opportunities.
• Access to mentoring and development programs.
• Discounts on selected health insurance funds, personal travel, gyms, vehicles and retail brands.
• Parental leave program and super booster.
  

About Aurizon.

https://youtu.be/PHESxVZ6dQY

Aurizon is Australia’s largest rail freight operator and a top 100 ASX company.Each year, we deliver more than 250 million tonnes of Australian commodities right across the country. Aurizon is crucial to the Australian economy, connecting miners, primary producers and industry with international and domestic markets.

Look to Aurizon for a diverse and collaborative culture.

At Aurizon, we are proud of our diverse, collaborative, creative and high-performance culture. We celebrate the contribution of every employee and provide opportunities for career development in a dynamic, caring, and inclusive work environment.

To learn about us and our company values, please visit www.aurizon.com.au/careers

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