Deputy Head Of Security

Sizewell C; Greater London; On-site; GBP 95,000; Full time

Job summary

A national critical project is seeking a Deputy Head of Security to lead the security function and ensure safety across multiple key sites. This senior leadership role involves influencing strategy, managing teams, and collaborating with government and industry partners. The ideal candidate will have a strong background in security leadership with a focus on regulatory compliance and the nuclear sector. The position offers a competitive salary of up to £95,000, alongside various benefits including a car allowance and opportunities for professional development.

Benefits

Up to 10% bonus

Private healthcare

Car allowance

Discounted gym memberships

28 days annual leave plus bank holidays

Qualifications

• Relevant qualifications and experience in security leadership and regulatory compliance.
• Experience with nuclear or critical infrastructure security preferred.

Responsibilities

• Depute for the Head of Security and lead the security function when required.
• Manage two direct reports and oversee delivery across the wider security team.
• Own and deliver the Integrated Security Assurance Plan across all SZC sites.
• Lead regulatory interactions with the Office for Nuclear Regulation.
• Drive continuous improvement of security policies, procedures, and standards.
• Represent the organisation in external meetings and forums.

Skills

Strong communication skills

Strategic thinking

Team management

Job description

Deputy Head of Security

Location: London (with travel to Gloucestershire, Suffolk, and occasional visits to Manchester)

Salary: Up to £95,000 negotiable depending on experience plus car allowance of £6,000 plus private healthcare and up to 10% bonus. 28 days annual leave + bank holidays, opportunity to buy and sell additional holiday, contributory pension up to 7.5% employee / up to 15% employer, opportunities for professional development, discounted gym memberships, etc.

Contract: Permanent, Full time. Closing date: Sunday the 11th of January 2026.

Why join as Deputy Head of Security?

This is a senior leadership role at the heart of our security function. You will deputise for the Head of Security and play a pivotal role in ensuring the safety and security of a nationally critical project. From managing regulatory relationships to overseeing security assurance across our sites, this role offers the opportunity to influence strategy, lead a team, and work closely with government, regulators, and industry partners.

Responsibilities

• Depute for the Head of Security and lead the security function when required.
• Manage two direct reports and oversee delivery across the wider security team.
• Own and deliver the Integrated Security Assurance Plan across all SZC sites.
• Lead regulatory interactions with the Office for Nuclear Regulation (ONR) and ensure engagement with other key stakeholders.
• Drive continuous improvement of security policies, procedures, and standards.
• Represent the organisation in external meetings and forums to promote best practice and compliance.

Qualifications

Relevant qualifications and experience in security leadership, regulatory compliance, and nuclear or critical infrastructure security preferred. Strong communication, strategic thinking, and team‑management skills are essential.