Deputy Head of Security

Sizewell C Ltd; Greater London; On-site; GBP 80,000 - 95,000; Full time

Job summary

A leading energy project firm in the UK is seeking a Deputy Head of Security to oversee the security function for a nationally critical project. This senior role involves managing regulatory relationships, leading a team, and ensuring robust security measures. Applicants should have at least 5 years of experience in a similar role within regulated industries and demonstrate strong leadership, project management, and stakeholder engagement skills. A competitive salary and benefits package are offered.

Benefits

Private healthcare

Car allowance

Generous annual leave

Pension contribution

Professional development opportunities

Discounted gym memberships

Qualifications

• Minimum 5 years experience in a similar role within a highly regulated industry.
• Strong project management skills and experience in delivering security functions.
• Proven ability to work with regulators and senior stakeholders.
• Excellent leadership and relationship-building skills.
• Experience in contract management, risk management, and budget control.

Responsibilities

• Deputise 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).
• Manage security risks and ensure robust mitigation measures are in place.

Skills

Project management

Regulatory engagement

Leadership

Stakeholder relationship building

Job description

Job Description

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. In addition there is a range of other benefits including: 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. If you thrive in a highly regulated environment and want to make a real difference, this is your chance.

What you’ll be doing

• Deputise 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 compliance with Security Assessment Principles (SyAPs).
• Act as the Intelligent Customer for Nuclear Services Security (NSS), holding them accountable for delivery to time, cost, and quality.
• Drive the development of SZC’s security culture and maintain regulated area status for processing Sensitive Nuclear Information.
• Manage security risks and ensure robust mitigation measures are in place.

What we’re looking for

• Minimum 5 years experience in a similar role within a highly regulated industry.
• Strong project management skills and experience in delivering security functions.
• Proven ability to work with regulators and senior stakeholders.
• Excellent leadership and relationship building skills.
• Experience in contract management, risk management, and budget control.

Desirable: Knowledge of cyber security frameworks and business continuity.

Additional Information

Join the team at Sizewell C. Our vision is to Lead The Way On Nuclear. The Sizewell C team is one of the most exciting and largest new megaprojects in the UK, whilst being at the forefront of the UK’s climate change agenda and energy policy. We have begun constructing a 3.2‑gigawatt nuclear power station on the Suffolk coast in the East of England replicating, wherever possible, the design used for Hinkley Point C, another nuclear power station being built in Somerset. When built, Sizewell C will be one of the largest power stations to operate in the UK. The power station will generate low‑carbon electricity for at least 60 years, supplying over 6 million homes and supporting around 7% of the UK’s current electricity needs.

We want Sizewell C to define what good leadership for the nuclear industry and British infrastructure looks like and deliver on it. We understand the feats of organisation, logistics, collaboration and imagination that building nuclear requires. We are building for the next generation for their home‑grown energy, energy price stability and ultra‑low carbon power in abundance. We also want to set the benchmark for maximising long‑lasting social value as we build and demonstrate how smart collaboration can work for the benefit of communities – locally, regionally and nationally.

We are the first nuclear power station in the UK to be funded under the Regulated Asset Base funding model (RAB). Our largest shareholder is the UK Government, alongside equity partners La Caisse, Centrica, EDF and Amber Infrastructure. Sizewell C operates within a complex and fast‑moving stakeholder environment, engaging with a wide range of partners including government bodies, regulators, local communities, supply chain partners, and international collaborators. This makes Sizewell C a uniquely stimulating place to work – where navigating evolving priorities, balancing interests, and building trusted relationships is just as critical as technical excellence. For those who thrive in dynamic, multi‑dimensional settings, it offers unmatched professional challenge and growth.

When joining Sizewell C, you may wonder why you are contacted by colleagues with an EDF email or see the EDF logo on portals that you access and/or documentation you receive; this is because we have partnered with EDF for the provision of a number of support services whilst we complete a successful transition out of the EDF group.

We encourage and embrace diversity and how it can improve our experience and performance at work. It is a requirement that those who join us have the right to work in the UK. Whilst sponsorship may be a possibility that we can explore, we are fully committed to local recruitment where possible, and those already holding the right to work in the UK. To be appointed to this role, you will need to meet the criteria for Security Vetting, which will, ordinarily, require you to have been a resident of the UK for at least three of the past five years.

By submitting an application to this role, you acknowledge that you have read and understood Sizewell C’s employee privacy policy and EDF's employee privacy policy. Just to let you know, EDF will be processing and sharing information about your application on behalf of Sizewell C.