ICT Systems Engineer

Title: ICT Systems Engineer

Reports to: Managing Director

Location: Canberra-based, primarily embedded on client sites with minimal travel.

Clearance: Minimum NV1 security clearance required; NV2 or higher preferred for some Defence engagements.

About Calexi

There comes a time in every campaign when the dust settles, the noise fades, and you look around to see who is still beside you. That is when you know who you are fighting with and what you are fighting for.

At Calexi, we know that feeling well. We have stood shoulder to shoulder in the toughest places where trust is earned, not issued, and where the margin for error is measured in more than numbers. We are a team built from those moments: people who refuse to quit, who steady their hands when the work gets hard, and who take pride in leaving things better than they found them.

We are more than a consultancy. Yes, we solve complex problems for Defence, government, and industry, but we also build. We design, test, and create systems and technologies that strengthen the digital backbone our nation relies on. Our solutions are shaped by the same curiosity and craftsmanship that define our people: practical, precise, and built to serve something larger than ourselves.

What unites us is not just what we do; it's why we do it. We believe in service without ego, in the power of knowledge shared, and in the quiet confidence that comes from mastering your craft.

This is Calexi forged in purpose, driven by integrity, united by the belief that together we can build a safer, smarter, better world.

Purpose of the Role

The purpose of this role is to design, integrate, and sustain robust ICT systems that enable mission-critical operations for Calexi's Defence, government and industry clients. You will work directly with customers to deliver end-to-end systems engineering outcomes across architecture, implementation, and sustainment. The role requires strong technical depth, attention to detail, and an understanding of how security, performance, and reliability intersect in complex environments. This is a hands-on engineering role that blends design, operations, and assurance. You will represent Calexi's values in every interaction delivering capability that works, that lasts, and that earns trust through performance.

Veteran Commitment

Calexi proudly supports Australia's veteran community. We recognise the unique leadership, resilience, and mission-focused mindset that veterans bring to our teams. We actively welcome applications from veterans, reservists, and Defence partners seeking meaningful roles in secure ICT, cyber, and engineering domains.

Key Responsibilities

• Design, build, and maintain ICT systems across multi-domain environments (Windows, Linux, network, and cloud).
• Conduct system integration, configuration management, and lifecycle sustainment in line with Defence and government standards.
• Develop and maintain system documentation, including architectures, implementation plans, and assurance artefacts.
• Implement and validate controls aligned with ISM, PSPF, DSPF, and DISP requirements.
• Review and improve system performance, reliability, and maintainability through proactive monitoring and root-cause analysis.
• Collaborate with multidisciplinary teams (cybersecurity, infrastructure, software, and operations) to deliver integrated solutions.
• Support accreditation, readiness, and acceptance testing processes, ensuring traceability to requirements and compliance frameworks.
• Mentor and guide junior team members and APS staff to uplift technical capability.
• Engage confidently with clients and stakeholders, translating technical findings into actionable outcomes.
• Contribute to continuous improvement and knowledge sharing within Calexi's engineering community.

Level Differentiation

Junior Consultant (Position -1):

Scope: Owns work packages; supports small teams (1–2 staff).

Autonomy / Leadership: Medium – responsible for deliverables under guidance.

Key Outcomes: Timely delivery, positive client feedback.

Consultant (This Position):

Scope: Independent systems engineer; leads workstreams and coordinates delivery.

Autonomy / Leadership: Medium-High – influences design and execution.

Key Outcomes: High-quality, secure, and reliable systems delivered to standard.

Senior Consultant (Position +1):

Scope: Subject-matter expert; leads multiple streams and mentors others.

Autonomy / Leadership: High – guides direction with minimal oversight.

Key Outcomes: Innovative solutions, enterprise-level systems assurance.

Key Relationships

Internal: Managing Director, Technical Leads, Project Managers, and Calexi engineering teams.

External: Client stakeholders within Defence and government agencies, typically within small, high-trust teams of 2–6 specialists.

Qualifications & Experience

• Bachelor's degree in ICT, Engineering, Systems, or a related field (or equivalent Defence experience).
• 5–8 years of experience in ICT systems engineering, integration, or operations.
• Proficiency in infrastructure and systems administration across Windows, Linux, and virtualised environments.
• Strong understanding of network architecture, Active Directory, DNS/DHCP, and automation tools (e.g., Ansible, PowerShell, Bash).
• Familiarity with security frameworks (ISM, PSPF, DISP, ISO and Defence ICT environments.
• Experience in systems design, configuration management, and documentation to industry or Defence standards.
• Desirable: experience with cloud platforms (Azure, AWS, or OpenStack) and modern DevSecOps or IaC toolchains.
• Certifications such as ITIL, CompTIA Security+, or vendor-specific (Microsoft, Red Hat, Cisco) are advantageous.

Performance Indicators

• Systems delivered on schedule and to specification.
• Verified compliance with relevant security and accreditation requirements.
• High client satisfaction and stakeholder trust.
• Effective collaboration and clear communication across teams.
• Demonstrated growth in technical and leadership capability.

Work Level Standards & Conditions

• Salary range: $120,000 – $160,000 + superannuation, depending on skills, experience, and clearance level.
• Includes an annual professional training allowance for ongoing development and certification.
• Flexible work arrangements may be available subject to client site requirements.
• Calexi provides flexibility for Defence Reserve service, family responsibilities, and professional study.
• Opportunities exist for promotion to Senior Consultant and beyond within 2–3 years, based on performance and client outcomes.

Culture & Belonging

At Calexi, you'll find people who have your back, who push you to grow, trust you to lead, and celebrate your wins as their own. We look after each other because we know what it takes to stand together; and because we know the mission isn't only out there in the field, the code, or the network. It lives in how we show up for one another every day.

Welcome home. Take pride in what you've built and lift your eyes to what comes next. There's still work to be done, and the world needs what we're creating.

Apply here or visit to learn more about our mission-ready team.