We are seeking an experienced Head of Security Assurance to lead cyber oversight and ensure secure, resilient, and data-focused infrastructure within a critical national sector. This is a unique opportunity to shape cyber risk management, guide strategic programmes, and engage with senior stakeholders across government and industry. Key Responsibilities: Lead cyber security assurance and oversight across the organisation Drive strategy for risk reduction and resilience planning Manage threat assessments and critical asset protection Build strong partnerships with government, regulators, and third parties Lead and develop a small team of security professionals Key Skills: Chartered status (UK CSC, CISSP, or equivalent) Strong technical knowledge of IT infrastructure, software, and security architecture Proven experience in cyber risk management, intelligence analysis, and assurance Ability to influence and engage at senior leadership level Experience working in regulated, government, or national infrastructure environments