Introduction

Company cultures & job summary

Our client is looking for an experienced Security Architect with deep expertise in endpoint security and vulnerability management to support a high-profile UK Government defence account. You'll be designing and delivering security capabilities within secure, air-gapped environments, so hands-on experience in offline network security is essential.

Working Patterns and location - Fully on site

Key responsibilities

• Lead the architecture, design, and implementation of endpoint security solutions across backend platforms.

• Design and deliver security capabilities for offline, air-gapped environments including secure update mechanisms.

• Define and implement vulnerability management frameworks covering scanning, risk prioritisation, and remediation.

• Ensure all solutions comply with MOD and UK Government security policies including JSP and NCSC guidance.

• Conduct security assurance activities including design reviews, compliance assessments, and audit support.

• Produce and maintain formal security documentation including HLDs, LLDs, SOPs, and accreditation evidence.

• Support MOD risk management and accreditation processes in line with governance requirements.

• Define penetration testing scope for both backend platforms and end-user endpoints.

Skills & experience

• Demonstrable experience as a Security Architect or senior security SME in secure or regulated environments.

• Proven ability to design and deliver enterprise AV and Endpoint Detection and Response (EDR) solutions.

• Strong hands-on experience with vulnerability management platforms, lifecycle processes, and remediation reporting.

• Solid experience working in offline or air-gapped environments including secure patching and AV signature management.

• Working knowledge of MOD security standards including JSP 440, JSP 604, JSP 453, and NCSC guidance.

• Experience applying the NIST Cybersecurity Framework within platform and endpoint security design.

• Ability to produce formal technical documentation including HLDs, LLDs, security architecture docs, and SOPs.

• Experience supporting security accreditation, risk management, and compliance evidence generation for MOD programmes.

The client would also like to see some of the below, but this is not essential:

• Previous experience working within the Defence and/or Aerospace sector.

• Familiarity with classified or high-assurance government environments.

• Understanding of MOD operating models and delivery frameworks.

• Experience supporting incident response within restricted or disconnected networks.

Additional benefits

• Flexible working arrangements.

• Provide expert financial guidance to help you select a pension plan tailored to your lifestyle.

• Company culture that places a premium on achieving a healthy work-life balance.

• Offer competitive bonuses and generous compensation packages.

• Prioritise traits such as curiosity and a good-natured sense of humour.

• Encourage and assist staff in participating in local community initiatives.

• 25 days holiday + bank holidays

• Buy/Sell holiday

• Death in Service - 3x salary

• Performance Bonus

• Cycle to work scheme

• Pension Scheme

Our client is committed to providing a diverse and inclusive workplace and welcomes applications from all backgrounds.

Part-time opportunities/flexible working is available to suit individual needs.

Please note that the client has determined that the off-payroll working rules will apply to this assignment and therefore this contract will be run through an Umbrella Company. Income tax and primary national insurance contributions will be deducted at source from any payments made to the intermediary.

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