Senior Network and Security Engineer

Clerk Grade: 9/10

Salary Range:
$129,464 - $142,665 plus superannuation and leave loading

Employment Type: Full-Time, Ongoing

Location: Sydney - Hybrid opportunity. In-office requirement 2-3 days a week as a minimum, which could be subject to change based on applicable DCS workplace policies.

Application Closing: Thursday, 16th October 2025 [10:59am]

About the Role

We are seeking an experienced
Senior Network & Security Engineer
to join our team to design, implement and manage a secure, high-performing network infrastructure. This critical role safeguards our organisation's systems and data from cyber threats and keeps us operating 24 x 7. The Senior Network and Security Engineer provides daily support and technical insights to the broader business. Responsibilities include managing ServiceNOW tickets, mitigating security vulnerabilities, supporting the project team, integrating new products into the operational environment.

You will be expected to participate in 24 x 7 on call roster.

Key Responsibilities

• Design, implement, and maintain robust network infrastructure components including firewalls, VPNs, load balancers, switches, and routers.
• Conduct continuous network monitoring, performance tuning, and advanced troubleshooting (Level 3 support) to resolve complex issues and proactively identify and mitigate risks before they impact operations.
• Monitor network capacity and performance to meet current and future demands.
• Minimise operational risk and enhance availability by enforcing access controls, monitoring protocols, and documentation standards, support security audits with evidence of compliance measures.
• Develop and maintain operational procedures to ensure consistent execution and reduce unplanned outages.
• Review and endorse network configuration and equipment changes to maintain stability and security.
• Assess emerging technologies and solutions to enhance network security and data protection.
• Analyse operational data (incident and change records) to identify trends and support continuous improvement initiatives.

Key Challenges

• Balancing proactive and reactive support while aligning with strategic and tactical goals.
• Enforcing security controls without compromising network responsiveness and availability in a high-volume, fast-paced environment.
• Staying current with cyber security best practices and emerging threats, providing timely and relevant advice to stakeholders.

Key Knowledge and Experience

• Extensive experience in network engineering and operations, with at least 5 years in a senior-level role.
• Bachelor's degree in computer science, Information Technology, or related field

• Current professional certifications preferred:

• Cisco (CCNP, CCDP)

• Palo Alto Firewalls

• F5 (BIG-IP LTM, etc)

• Hands-on experience managing complex enterprise networks, including:

• Wireless LAN: Cisco WLC and APs

• Routing/Switching: BGP, OSPF, STP
• Load Balancing: F5, Citrix NetScaler
• Security: Palo Alto Firewalls, Cisco ISE
• Data Centre Networking: Cisco ACI, Cisco Nexus OS
• WAN Technologies: SD-WAN
• Core Services: DNS/DHCP, SSL/TLS Certificate Management

• Cloud Networking: AWS, Azure

• Advantageous skills:

• Scripting and automation knowledge

• Strong problem-solving and analytical skills
• Excellent documentation and technical reporting abilities
• Ability to work autonomously and perform under pressure

Essential Requirements

• Must be an Australian Citizen or Permanent Resident.
• Participation in a 24x7 on-call roster

Why Join Us?

This is an exceptional opportunity to apply your advanced network security skills in a challenging environment where your expertise will directly impact the organisation's security posture and operational success. You'll work with a talented team committed to innovation and resilience in our network infrastructure.

What we need from you

An up-to-date CV (max 5 pages) and a cover letter (max 2 pages) outlining how your knowledge, skills and experience are aligned to the role. In your cover letter, please provide expiration date with any following certifications: Cisco, Palo Alto and F5

Please note that assessments will be conducted for this role. This involves submitting your application for review, an interview, workplace assessment and reference checks.

A talent pool may be created from this recruitment action for future temporary or ongoing vacancies in roles with similar capability requirements.

Salary Grade 9/10, with the base salary for this role starting at $129,464 base plus superannuation

Click Here to access the Role Description. For enquiries relating to recruitment please contact Michael Yoon via

Visit the Capability Application Tool to prepare for the recruitment process by accessing practice application and interview questions based on the focus capabilities listed in the role description.

Closing Date: Thursday, 16th October :59am)

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