Senior Systems & Cyber Security Specialist

Our client is a leading Australian Defence technology organisation supporting complex maritime capabilities. They are seeking a Senior Systems & Cyber Security Specialist to contribute to cyber security assurance, system accreditation and security risk management across a major Defence maritime program.

Working within a project environment, you'll support the design and implementation of security controls, assess system risks and help ensure systems meet Defence security requirements. You'll collaborate with engineering teams and key stakeholders across the program, contributing to system authorisation, security documentation and incident response.

• Conduct security risk and vulnerability assessments, identifying risks and recommending mitigation strategies.
• Develop and maintain security documentation, including System Security Plans (SSPs), risk management plans and supporting accreditation artefacts.
• Support system certification, accreditation and authorisation activities across Defence program environments.
• Apply relevant security frameworks, including the Australian Government Information Security Manual (ISM), Defence Security Principles Framework (DSPF) and Protective Security Policy Framework (PSPF).
• Define security requirements and advise on system design, security controls and compliance obligations.
• Monitor security events, investigate cyber incidents and coordinate response and recovery activities.
• Support security administration, access governance and privileged access reviews.
• Contribute to digital forensic investigations, evidence handling and security reporting.
• Work with engineering, risk and operational stakeholders to strengthen security controls and improve security processes.

What You'll Bring

• Minimum four years' relevant experience in cyber security or a related technical field.
• Experience implementing and supporting cyber security controls across enterprise, project or operational environments.
• Experience supporting system accreditation, certification or authorisation activities.
• Knowledge of security risk assessments, vulnerability management and compliance reviews.
• Familiarity with security frameworks such as the ISM, DSPF and PSPF.
• Experience developing and maintaining security documentation, standards and governance artefacts.
• Understanding of security monitoring, SIEM tools, incident response and security across Windows, Linux and network environments.
• Strong analytical, problem-solving and stakeholder communication skills.
• Relevant qualifications in cyber security, IT, technology or engineering.
• Australian citizenship and the ability to obtain and maintain the required Defence security clearance.

Experience in Defence, maritime, government or other highly regulated environments will be highly regarded. Relevant certifications such as CISSP, CISM, CISA or CRISC are also advantageous.

• Contribute to a major Defence maritime program with significant national security outcomes.
• 12-month contract offering $1,200–$1,300 per day
• Work across systems security, risk, assurance and incident response.
• Collaborate with multidisciplinary engineering and cyber security teams.
• Build your expertise in Defence security frameworks and system accreditation.
• Take ownership of security activities while contributing to continuous improvement.

How to apply

Applications are treated with absolute confidentiality. Click APPLY or contact Clodagh at clodagh@decipherbureau.com for an informal conversation about your next career move. Equal opportunity and diversity are valued and encouraged.