Cyber Security Consultant

Company: CBSbutler Holdings Limited trading as CBSbutler
Apply for the Cyber Security Consultant
Location: London
Job Description:

Cyber Security Consultant


Preston, London or Birmingham / Hybrid – 2 days per week onsite


£570 per day inside ir35


Active SC clearance


Sole UK National


We are looking for an experienced Cyber Security Consultant to join a major Defence programme, supporting the onboarding of new service providers into a complex SIAM / multi-supplier environment.


This is a security governance, supplier integration and operational readiness role, rather than a hands-on technical security position.


Key Responsibilities



  • Develop supplier onboarding packs covering security processes, policies, governance and reporting.

  • Align incoming suppliers with established Incident Management, Vulnerability Management and Security Assurance processes.

  • Define supplier roles, responsibilities and interaction models across the SIAM/OI environment.

  • Identify and manage gaps between supplier capabilities and existing security requirements.

  • Support Security Management Plans, compliance reporting, audit and assurance activities.

  • Support Operational Readiness Reviews (ORR) and Service Commencement activities.

  • Produce clear, reusable security and service management documentation.

  • Coordinate with incoming and incumbent suppliers, transition teams and client stakeholders.

  • Support operational readiness across incident management, vulnerability management, monitoring, backup/recovery, access control and service reporting.


Key Experience



  • Cyber Security Governance, GRC or Security Assurance experience.

  • Strong experience within SIAM / multi-supplier environments.

  • Good understanding of security and service management processes.

  • Experience with supplier onboarding, transition or transformation programmes.

  • Strong stakeholder management and documentation skills.

  • Experience supporting compliance, audit and assurance activities.

  • Knowledge of NIST CSF, Secure by Design and NCSC guidance would be advantageous.


Defence or wider Government/high-security experience is highly desirable.If you have the required active SC clearance, are a sole UK national, and have strong security governance/SIAM experience, I’d be keen to hear from you.

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Posted: September 17th, 2026