Junior Security Administrator in Warrington

Location: Warrington, Cheshire + Hybrid Working Arrangement

Compensation: Attractive Salary + Benefits

Role Type: Full time / Permanent

Safeguarding People, Programmes and National Security – Your Career Starts Here

At Cavendish Nuclear, we’re working to create a safe and secure world, together. If you join us, you can play your part as a Junior Security Administrator at our Warrington, Cheshire site.

The role:

As a Junior Security Administrator, you play a vital role in protecting people, information and critical infrastructure within a major national defence programme. Supporting the Head of Security and wider security team, you help ensure security processes operate smoothly, compliantly and effectively across a highly regulated environment.

The role is 37 hours per week, Monday to Friday, and is based at our Warrington site. Hybrid working patterns are available, and some travel to other Cavendish Nuclear, Babcock and customer sites will be expected.

Day-to-day, you’ll be required to:

• Providing personnel security advice in line with current HMG and company security policy
• Managing security clearance processes, including upgrades, transfers and access requests
• Maintaining accurate security records, spreadsheets and compliance data using Microsoft Excel
• Coordinating starters, leavers, site access and visitor processes across secure facilities
• Supporting audits, training compliance and general administration for the Security team

Essential experience:

• Experience in an administrative, coordination or support role within a structured environment
• Strong working knowledge of Microsoft Excel and Microsoft Office applications
• Excellent written and verbal communication skills
• High attention to detail with the ability to manage data accurately
• Ability to work independently while contributing positively to a team environment

Qualifications:

• Membership with the Defence and Security Industry Association (DISA) or the Security Institute is highly desirable
• We value difference and don’t have a fixed idea when it comes to background or education, provided you can show the required level of experience and willingness to learn then we would like to hear from you

Security Clearance:

The successful candidate must be able to achieve and maintain Security Check (SC) security clearance for this role.

What we offer:

• Generous holiday allowance
• Matched contribution pension scheme, with life assurance
• Access to a Digital GP, annual health check, and nutritional consultations through Aviva DigiCare+
• Employee share scheme
• Employee shopping savings portal
• Payment of Professional Fees
• Reservists in the armed forces receive 10-days special paid leave
• Holiday Trading is a benefit that allows UK Cavendish employees to buy additional leave or to sell up to one working week of annual leave from their annual entitlement.
• ‘Be Kind Day’ enables employees to take one working day's paid leave a year (or equivalent hours) to undertake volunteering work with their chosen organisation or registered charity
• Excellent development opportunities and benefits package including an employee assistance programme supporting physical, mental and financial wellbeing.

Cavendish:

We’re Cavendish Nuclear — a team of c5,000 specialists and a core part of Babcock International Group. Here, you’ll be part of something bigger. Across clean energy, defence, and civil decommissioning, your work will contribute to projects that are critical to energy security and national protection. Together, we’re shaping a future that lasts — not only through the impact we make, but through meaningful careers that respect your work-life balance.

Join us and discover how far we can go, together.

We are a disability confident committed employer. If you have a disability or need any reasonable adjustments during the application and selection stages, please email careers@babcockinternational.com with the subject header ‘Reasonable adjustments requirement’. We’re committed to building an inclusive culture where everyone’s free to thrive. We are happy to talk about flexible working – please ask about alternative patterns of work at interview.

Closing date: 19/05/2026