Cyber Security Engineer

About Calexi

Calexi is an Australian-owned cybersecurity and systems engineering company helping Defence, government, and critical infrastructure clients strengthen resilience against emerging threats. We build and secure technology that matters operating at the intersection of innovation, assurance, and mission focus.

About the Role

As a Cyber Security Specialist at Calexi, you will play a key role in delivering cyber capability into mission-critical environments. You will join Calexi as a full-time employee and be initially assigned to one of our Canberra-based Defence or government contracts. In future, you may be redeployed to other client programs as opportunities evolve providing variety, professional growth, and exposure to complex national-security projects.

This is a mid-to-senior-level position suited to professionals with strong technical, analytical, and stakeholder engagement skills who want to make a tangible contribution to Australia's cyber resilience. The successful candidate must be able to opperate independently.

Key Responsibilities

• Perform security assessments and configuration reviews of systems, applications, and networks against ISM and Essential Eight controls.
• Develop and implement hardening and remediation plans, ensuring identified vulnerabilities are tracked and resolved.
• Support secure-by-design reviews, providing input into architecture and system designs.
• Conduct SIEM monitoring and event triage, escalating incidents and assisting with containment and recovery.
• Maintain security documentation (risk registers, incident reports, vulnerability tracking, system security plans).
• Collaborate with project and operations teams to embed security controls throughout the lifecycle.
• Support audit and compliance reporting, including evidence gathering for DISP and ISO 27001 activities.
• Participate in continuous improvement, recommending enhancements to monitoring, logging, and response processes.
• Contribute to knowledge sharing and mentoring across the Calexi cyber capability.

Skills & Experience

• Extensive hands-on experience designing, deploying, and maintaining cybersecurity systems and capabilities (hardware and software).
• Practical knowledge of ISM Security Controls and their implementation within classified or secure environments.
• Familiarity with Defence cybersecurity frameworks, including A&A and DISP requirements.
• Strong understanding of Windows, Linux, and networking fundamentals (TCP/IP, VLANs, firewalls, routing).
• Working knowledge of virtualisation and storage technologies (KVM, VMware).
• Competence with scripting or programming (PowerShell, Python, Java) for automation or analysis.
• Understanding of threat modelling, vulnerability assessment, and incident response.
• Familiarity with integrating emerging technologies into secure infrastructure environments.
• Experience supporting Defence or government projects with security clearance.
• Proven ability to prepare and maintain security and technical documentation.
• Relevant tertiary or vocational qualifications in cybersecurity, systems, or network engineering.
• Certifications such as CompTIA CySA+, Splunk, GIAC, or equivalent.
• Strong understanding of the Australian Information Security Manual (ISM), Protective Security Policy Framework (PSPF), and ISO 27001.
• Experience with SIEM platforms (Splunk, Elastic, Sentinel, etc.) and vulnerability management tools (Nessus, Qualys, OpenVAS).
• Ability to interpret and apply security frameworks to practical engineering outcomes.
• Excellent communication and stakeholder management skills.

Security & Eligibility Requirements

• Australian citizenship is mandatory (due to clearance & ITAR requirements).
• NV2 clearance preferred; NV1 applicants with strong experience will also be considered.
• Applicants within 12 months of separating from Defence should note that transition rules may restrict immediate engagement; eligibility will be assessed case-by-case.

Veterans & Defence Community Commitment

Calexi is proud to support Australia's veteran community. We actively encourage applications from veterans and Defence families who want to continue contributing to national resilience through cyber operations, systems engineering, and digital defence capability.

Employment & Benefits

• Permanent full-time Calexi employee with access to all staff benefits.
• Professional development and certification support.
• Annual performance and remuneration reviews.
• Access to mentoring and internal leadership programs.
• Opportunity to work across multiple Defence and government projects.

Work Authorisation

• Australia (Required)

Location

• Canberra, ACT 2600 (Required)

Job Types: Full-time, Permanent

Pay: $160,000.00 – $180,000.00 per year

Benefits:

• Professional development assistance

Application Question(s):

• What is your current security Clearance Level?

Experience:

• Cyber or IT: 5 years (Required)

Work Authorisation:

• Australia (Required)

Location:

• Canberra ACT 2600 (Required)

Work Location: In person