Senior Network and Systems Administrator

We're seeking a Senior Network Systems Administrator to take ownership of complex network environments and drive technical excellence across our ICT and DevSecOps platforms. This role suits someone with deep technical expertise, a strong understanding of compliance, and a passion for secure, scalable solutions.

What you'll do:

• Architect and maintain secure, high-performance network infrastructure
• Manage and optimise virtual environments (ESXi, NSX, vSphere, Kubernetes)
• Implement and support firewalls, load balancers, gateways, and other security products
• Lead change control processes and ensure compliance with industry standards
• Monitor and troubleshoot complex network systems using advanced tools
• Design and test disaster recovery and backup solutions
• Automate network operations using tools like Ansible, Python, and PowerShell
• Collaborate across teams and mentor others in technical best practices

What you bring:

• Strong experience in secure, regulated environments (e.g. defence, government)
• Advanced knowledge of routing, switching, VPNs, and protocols like BGP, OSPF, MPLS
• Hands-on experience with Cisco, FortiNet, and Linux systems
• Proven ability to analyse and improve complex network architectures
• Excellent documentation and communication skills
• Willingness to apply for a Defence Security Clearance

If you're driven by purpose and thrive in complex environments, we'd love to hear from you.

Qualifications

Tertiary Education Information Technology or equivalent experience.

Security Clearance

Applicants must be Australian citizens and eligible to hold and maintain an Australian Defence Security Clearance. Defence experience is desirable.

More information:

About the Company:

For over 25 years, Consunet has grown as a sovereign enterprise, delivering leading and trusted cyber and spectrum security solutions with agility, precision, and purpose - protecting what matters most and safeguarding our national interests. Our expertise across Information Warfare, Spectrum Management, Cyber & DevSecOps, and Logistics empower us to shape the future of cyber and spectrum security - both in Australia and internationally. With a legacy built alongside Australia's Defence and Intelligence communities, we bring the highest level of assurance and trust to everything we do. As we expand into global markets, we remain grounded in our values: trusted, sovereign, excellent, leading, and sustainable. We also prioritise transparency and accountability - standing by our commitments and delivering accordingly.

Our mission is to grow our capability to solve our customers' most complex problems with speed, efficiency and reliability. To learn more about Consunet, please visit:

Why join us?

• Join a sovereign Australian enterprise driving innovation to protect national interests, offering meaningful work, career growth, and a supportive, flexible environment.
• Consunet is headquartered in the Adelaide CBD with operations in Adelaide, Edinburgh (SA) and Canberra.
• We encourage applications from veterans and reservists—your experience is valued here. We support veterans through recruitment, flexible work, reservist leave, a Veterans Policy, dedicated points of contact internally, and an EAP specialising in defence. We invite veterans to voluntarily disclose their prior military service.
• We are committed to creating a diverse and inclusive workplace.
• People of all genders, cultures, and backgrounds are encouraged to apply.
• Consunet offers flexible work and an inclusive environment to support our people to thrive, with an EAP service which has specialist defence experience to support wellbeing.

Benefits working for Consunet

• Be part of a workplace that values innovation, quality, and work-life balance.
• Enjoy a flexible, inclusive, and friendly work environment.
• Access competitive pay and salary packaging options.
• Take advantage of parental leave and our Study Loan Scheme.
• Build your career with training, development, and clear pathways for progression.
• Work with cutting-edge technology, research, and agile project management.
• Benefit from mentoring and support by experienced team members.

To Apply:

Click "Apply Now" and attach your CV along with a Cover Letter summarising your experience.