We are seeking an experienced SC Cleared Cyber Security Assurance Lead to oversee and drive the Security by Design (SbD) workstream for a major assurance process project. This role requires deep expertise in security governance, cloud architecture assurance, and security control frameworks, with the ability to work closely with client stakeholders to ensure that all SbD requirements, artefacts, and controls are correctly identified, implemented, and evidenced throughout the project lifecycle.Key Responsibilities:Lead the Security by Design (SbD) Workstream: Own and lead the end-to-end Security by Design assurance process across all project phases.Determine the required SbDartefacts, ensuring they align with organisational security policies andrelevant regulatory requirements. Stakeholder Engagement and Governance: Work collaboratively with clientsecurity, architecture, risk, and delivery stakeholders to gather information,validate assumptions, and ensure clear alignment with security expectations. Assurance and Compliance: Conduct detailed assessments of proposed architectures and solutions against NIST 800-53 security controls, identifyingcontrol gaps and required mitigations. Required Skills and Experience: Strong working knowledge of NIST 800-53 controls and their application toEnterprise and government-gradesystems.Cloud security architectureexpertise, with the ability to review and challenge designs across AWS, Azure, and hybrid architectures.In-depth understanding o