Our client is seeking an experienced Principal System Cyber Security Specialist to lead security assessment, accreditation, and authorisation activities across complex classified ICT and Operational Technology (OT) environments.
The role You will be responsible for leading cyber security assessment and accreditation activities throughout the system lifecycle.
Key responsibilities: •Conduct cyber security assessments and risk reviews across classified ICT and OT environments •Develop accreditation documentation and manage ATO packages to meet •Defence security requirements •Ensure compliance with ISM, PSPF, DSPF and DISP frameworks •Support secure system design, architecture reviews and security control assessments •Provide cyber security guidance to engineering, project and sustainment teams •Collaborate with Defence stakeholders, Authorising Officers and external assessors to maintain system accreditation and assurance outcomes What you'll bring •Experience in cyber security assurance, system security, accreditation, or security assessment roles •Strong knowledge of security risk management, security controls,



and compliance frameworks •Proven ability to develop security accreditation documentation and assurance artefacts •Experience supporting Defence, Government, or other highly regulated environments •Understanding of Defence cyber security governance and accreditation processes Clearance Requirement: NV1 security clearance What's in it for you?
Work on a nationally significant Defence capability, lead cyber security accreditation, assurance and ATO activities across complex classified ICT/OT environments while collaborating with Defence stakeholders and technical teams.
Daily Rate: $1,200/day Location: Adelaid | Hybrid – up to 2 days WFH per week Flexibility: 9-day fortnight available How to apply Applications are treated with absolute confidentiality.
Click APPLY or contact Clodagh at ************************** for an informal chat about what you want next in your career.
Equal chance and diversity are a priority.
We encourage applicants from all backgrounds.

📌 Principal Cyber Security Specialist - Security Assurance & Accreditation (South Australia)
🏢 The Decipher Bureau
📍 South Australia