Sizewell C
Personnel Security Assurance Lead (2LD)
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Sizewell C Personnel Security Assurance Lead
Sizewell C is entering an exciting phase of growth as we mature into an independent organisation and continue building one of the UK’s largest and most important energy projects. We are now recruiting the below position:
Position: Personnel Security Assurance Lead
Security Clearance: Active Security Clearance (SC) is required for this role
Location: London with hybrid working; regular travel between Suffolk and Gloucestershire office locations
Contract: Permanent, full-time
Salary: £66,866 - £70,000 depending on experience, plus benefits
Benefits include:
- Annual Leave: 28 days per annum, increasing to 30 days after 5 years of service, plus bank holidays
- Bonus: 5% annual bonus
- Pension Contributions: Defined Contribution Pension Scheme with up to 7.5% employee contribution and 15% employer contribution
- Life Assurance: Up to 8 x salary
Closing date: 24th October 2026
Role Overview:
We are seeking a Personnel Security Assurance lead to provide Level 2 assurance oversight across personnel security arrangements for the Sizewell C programme. Reporting to the Deputy Head of Security, Resilience and Assurance you will lead personnel security assurance activities covering vetting, onboarding, workforce mobilisation, access control and compliance. Working closely with HR, Recruitment, Training, Site Security and Nuclear Services Security (NSS), you will help ensure personnel security arrangements are effective, proportionate and aligned with regulatory and organisational requirements. This is a highly visible role providing the opportunity to influence senior stakeholders, shape personnel security strategy and support the secure mobilisation of one of the UK's largest infrastructure projects.
Role Responsibilities:
- Lead the Personnel Security Line 2 Assurance Programme for Sizewell C, delivering risk-based assurance, reviews and monitoring activities.
- Provide oversight of vetting, onboarding, access approvals and personnel security controls across the programme.
- Develop and maintain personnel security policies, procedures, standards and guidance.
- Identify personnel security risks and ensure corrective actions are implemented and tracked through to completion.
- Support the continuous improvement of personnel security processes, controls and governance arrangements
- Manage corporate office access control arrangements and act as the escalation point for complex personnel security matters.
- Lead personnel security input into audits, inspections and assurance activities.
- Manage the NSS personnel security task order, including performance monitoring and delivery against agreed objectives.
- Provide expert advice to managers and stakeholders on personnel security, vetting and access requirements.
- Produce assurance reports, performance updates and recommendations for senior leadership and governance forums.
- Build strong relationships with regulators, suppliers and internal stakeholders to support compliant and secure operations.
- Promote a positive security culture through engagement, awareness and continuous improvement activities.
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About You:
Knowledge & Skills
Essential
- Strong knowledge of personnel security, vetting, pre-employment screening, onboarding and access control within regulated or security-sensitive environments.
- Strong understanding of assurance, compliance monitoring, audit readiness and governance requirements, including maintaining accurate and auditable records.
- Ability to lead risk-based personnel security assurance activities, assess evidence, identify findings and drive actions through to closure.
- Ability to provide clear, proportionate advice on personnel security risks, vetting requirements, onboarding controls and access issues.
- Ability to influence and challenge senior stakeholders, resolve competing priorities and support risk-based decision making.
- Ability to work across HR, Recruitment, Training, Nuclear Services, Security and wider business functions to ensure compliant mobilisation and personnel security controls.
- Ability to develop and maintain personnel security procedures, governance documentation, reporting and management information.
- Excellent written and verbal communication skills, with the ability to produce concise reports, communicate complex issues clearly and maintain robust records.
Desirable
- Experience leading or contributing to governance forums, working groups or improvement initiatives relating to vetting, onboarding, access management, offboarding or assurance.
- Knowledge of governance and assurance requirements within regulated, nuclear, critical national infrastructure or major project environments.
Qualifications & Experience:
Essential
- Proven experience within a regulated, high-assurance or security-sensitive environment, with responsibility for personnel security, vetting, onboarding, access control or related assurance activities.
- Experience identifying and resolving complex personnel security risks and issues through sound judgement, escalation and effective mitigation.
- Experience leading or supporting audits, reviews, assurance activities or compliance inspections, including evidence gathering, reporting and action tracking.
- Experience implementing or overseeing personnel security controls in line with legal, regulatory, contractual and organisational requirements.
- Experience improving personnel security frameworks, governance arrangements, processes or control environments to enhance compliance and assurance.
- Experience managing or assuring office access control, pass administration and regulated access arrangements.
- Experience coordinating internal teams, suppliers and stakeholders to resolve personnel security issues and maintain compliance against agreed standards and timescales.
- Experience supporting governance forums, inspections and reviews, including evidence preparation, record management, action tracking and progress reporting.
- Relevant qualifications, accreditation or training in personnel security, vetting, compliance, assurance, governance or risk management.
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Desirable
- Project or programme delivery experience within major infrastructure, mobilisation, assurance or governance environments.
- Experience promoting security culture, compliance awareness and behavioural improvement through engagement, guidance and communications.
- Experience delivering personnel security activities within construction, nuclear, infrastructure or similarly regulated sectors.
- Experience producing personnel security, onboarding, assurance or compliance reporting, metrics and performance data.
Why Join Us?
- Be part of one of the most important low-carbon energy projects in the UK.
- Work in a mission-driven environment that values innovation, integrity, and long-term sustainability.
- Competitive salary, comprehensive benefits, and opportunities for career development.
- Flexible and hybrid working options.
Key Competencies
Behavioural Competences
Humility
- Recognise the value brought from different cultures and experiences
- Be open to others’ points of view and ideas, be willing to debate and to compromise
Positivity
- Positively challenge poor quality and performance
- Identify solutions at the lowest possible level
- Encourage tier 1s and others to bring new ideas forward
Respect
- Value the rules and environment in which we operate
- Give and receive feedback with respect
- Embrace and engage with new people and ideas
Solidarity
- One team, working closely together and helping each other
- Empowered teams always looking forward.
- Shared responsibility for delivering the project outcomes
Clarity
- Communicate clearly and consistently
- Promote collaboration and team alignment
- Clearer and faster decision making
- Drive simplification at all levels
If this sounds like the next step in your career, we’d love to hear from you. Apply today.
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