Senior Network Systems Administrator

About the Company:

For over 25 years, Consunet has grown as a sovereign enterprise, delivering trusted cyber and spectrum security solutions with agility, precision, and purpose. Our work protects what matters most by safeguarding national interests and supporting Australia's Defence and Intelligence communities.

Our expertise spans Information Warfare, Spectrum Management, Cyber & DevSecOps, and Logistics. These capabilities position us to shape the future of cyber and spectrum security in Australia and internationally. With a legacy built alongside Defence and Intelligence partners, we bring the highest level of assurance and trust to everything we do.

Today we are entering an exciting phase of global growth. As we expand into international 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 with speed, efficiency, and reliability.

Joining Consunet means becoming part of a purpose-driven team that is shaping the future of cyber and spectrum security worldwide. Here innovation, mastery and collaboration are at the heart of everything we do, and every person has the opportunity to grow with us on this journey.

To learn more about Consunet, please visit:

About the Team

You'll join our Network Systems Administration team, highly skilled and collaborative group dedicated to building and maintaining secure, high performance network infrastructure that underpins mission-critical software solutions. Our mission is to ensure resilient, compliant, and optimised network environments that support development, deployment, and operational continuity.

We value technical leadership, proactive problem solving, and cross-functional collaboration. Working closely with engineering and cybersecurity teams, you'll help drive innovation in secure network operations as we evolve to support emerging technologies, global delivery, and leadership development.

About the Role

We are seeking a Senior Network Systems Administrator to take a leading role in securing and optimising the ICT environments that underpin Consunet's software delivery. This senior level position offers the opportunity to influence enterprise wide infrastructure initiatives, mentor team members, and contribute to strategic improvements in secure network operations.

As part of our Network Systems Administration team, you'll work under general direction to design, maintain, and enhance resilient network infrastructure that meets strict performance and compliance standards. You'll collaborate across multi disciplined teams to enable secure operations, automation, and integration, while driving continuous improvement and innovation in a dynamic, security focused environment.

What You'll Do

• Lead the design and management of secure ICT environments for Consunet and its clients
• Architect and maintain resilient network and DevSecOps infrastructure
• Collaborate across engineering and cybersecurity teams to ensure performance and compliance
• Drive documentation, reviews, and continuous improvement initiatives
• Mentor junior team members and foster knowledge sharing across the team
• Influence infrastructure strategy and contribute to enterprise-wide initiatives

What You'll Bring

• Proven experience in senior-level network systems administration, ICT operations, or infrastructure support
• Strong skills in designing, maintaining, and securing enterprise network environments
• Ability to troubleshoot, analyse, and optimise system performance and reliability
• Design, build and support of a variety of virtual infrastructure, Linux servers, network environments and containerisation / orchestration
• Supporting this infrastructure in DevOps workflows
• Familiarity or experience with the CNCF product stack
• Excellent communication and collaboration skills across multidisciplinary teams
• Experience mentoring and enabling junior team members
• Understanding of compliance requirements and secure practices in regulated environments
• Eligibility to obtain and maintain an Australian Government Security Clearance (baseline or higher)

Why join us?

• With global expansion underway, we're opening exciting new career opportunities for people who want to help shape the future of cyber and spectrum security
• Joining Consunet means being part of a close-knit, purpose-driven team where innovation and collaboration are at the heart of everything we do
• Consunet is headquartered in the Adelaide CBD, with operations across Australia
• We are committed to creating a diverse and inclusive workplace.
• 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.
• 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.

Important note: Applicants must be Australian citizens and eligible to hold and maintain an Australian Defence Security Clearance. Defence experience is desirable. More information:

To Apply:

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