Cyber Security Process Alignment & Supplier Onboarding Consultant

CYBER SECURITY CONSULTANT – SIAM ONBOARDING & PROCESS ALIGNMENT

• Cyber Security Consultant – Process Alignment & Supplier Onboarding
• Initial contract until November 2026
• £570 per day via Umbrella
• Hybrid working – 2 days per week onsite
• Locations:
  Preston, Birmingham, or London
• SC Clearance required

Our client is delivering a large-scale Defence transformation programme within a complex multi-supplier environment. As part of a major transition initiative, they require an experienced Cyber Security Consultant to support the onboarding and integration of new suppliers into an established security operating model.

This is a governance-focused role, working closely with security, service management and transition teams to ensure suppliers are aligned to existing cyber security processes, standards, and compliance requirements from day one.

As the Cyber Security Consultant, you will play a key role in onboarding suppliers into a complex SIAM environment, ensuring security processes, governance requirements, and operational expectations are clearly understood and consistently adopted.

You will act as the central integration point between suppliers, security teams, operational stakeholders and programme leadership, translating existing cyber security processes into structured onboarding guidance and ensuring suppliers can demonstrate readiness prior to service commencement.

Working closely with Security Assurance, Incident Management and Vulnerability Management teams, you will help establish a repeatable onboarding framework that supports future supplier transitions while maintaining compliance with security and governance requirements.

• Developing supplier onboarding packs covering cyber security processes, governance, reporting requirements and operational expectations
• Defining supplier roles, responsibilities and interaction models across suppliers, service integrators and client stakeholders
• Supporting suppliers in understanding and aligning to established security processes including Incident Management, Vulnerability Management and Security Assurance
• Assessing supplier readiness and supporting service commencement activities
• Reviewing supplier documentation including Security Management Plans, compliance evidence and governance outputs
• Supporting audit, assurance and compliance activities
• Conducting gap analysis between supplier capabilities and programme requirements
• Producing clear process documentation, governance materials and onboarding guidance
• Supporting operational readiness reviews and service readiness assessments
• Working with transition teams to ensure effective supplier handovers and continuity of service
• Contributing to the development of a repeatable onboarding model for future supplier engagements

• Experience working within Cyber Security Governance, GRC, Security Assurance or Cyber Process roles
• Previous experience operating within SIAM or multi-supplier environments
• Strong understanding of:
  • Incident Management
  • Vulnerability Management
  • Security Assurance
  • Security Governance
• Experience supporting audit, compliance and assurance activities
• Strong stakeholder management and supplier engagement skills
• Experience working on large-scale transition, transformation or service onboarding programmes
• Ability to interpret operational security outputs and reporting without direct tooling ownership
• Strong documentation, communication and governance skills

• Knowledge of NIST Cyber Security Framework (CSF)
• Understanding of Secure by Design principles
• Familiarity with NCSC guidance and UK Government security standards
• Defence, Government, Critical National Infrastructure or highly regulated industry experience
• Experience supporting Service Readiness Reviews, Operational Readiness Reviews or Service Commencement activities