Security Engineer

Haystack; Remote; GBP 47,000 - 72,000; Full time

Job summary

A leading technology firm in the UK is seeking a Security Engineer to enhance the security posture of defence systems. This role involves implementing security controls, conducting assessments, and collaborating across teams. Candidates need strong knowledge of multi-layered security architecture and cloud security. The position offers a competitive salary, excellent benefits, and career progression opportunities.

Benefits

33 days annual leave

Contributory pension

Private medical insurance

Flexible benefits like gym memberships

Dynamic working environment

Career progression options

Qualifications

• Strong understanding of cyber security principles.
• Hands-on experience with cloud and on-premise security.
• Familiarity with MOD / Defence Digital environments is advantageous.

Responsibilities

• Implement and maintain security tooling across environments.
• Collaborate with teams to ensure systems meet security postures.
• Perform vulnerability assessments and security validation testing.

Skills

defence-in-depth

preventative and detective security controls

Virtualisation technologies (VMware, Hyper-V)

Networking & boundary protection (firewalls, gateways, load balancers)

Endpoint protection, DLP, malware prevention tools

cloud security (AWS, Azure, hybrid IaaS/PaaS/SaaS)

authentication & authorisation technologies (SAML, LDAP, PKI)

SIEM setup and operations

Excellent documentation, communication, and stakeholder management skills

UK Security Clearance eligibility

Job description

Overview

We’re hiring a Security Engineer to join a world-leading technology company supporting mission-critical defence and government programmes across the UK.

You’ll work as part of a multidisciplinary cyber engineering team ensuring that customer systems maintain a strong and resilient security posture. This role involves both hands-on implementation and strategic oversight of enterprise-grade security capabilities across cloud, network, and infrastructure environments. You’ll play a key role in designing, maintaining, and optimising layered security controls — helping to protect some of the UK’s most critical systems.

What you’ll do

• Implement and maintain security tooling and technical controls across on-premise and cloud environments
• Develop and document system security baselines and enforce compliance against defined standards
• Collaborate with engineering teams to ensure systems meet required security postures
• Forward and analyse logs within SIEM platforms to strengthen monitoring and threat detection
• Contribute to developing new policies, design processes, and technical documentation
• Perform vulnerability assessments, risk mitigation, and security validation testing
• Work with protective monitoring and incident response teams to maintain operational resilience

Core skills & experience

• Strong understanding of defence-in-depth and multi-layered security architecture
• Experience implementing preventative and detective security controls
• Hands-on knowledge of:
• Virtualisation technologies (VMware, Hyper-V)
• Networking & boundary protection (firewalls, gateways, load balancers)
• Endpoint protection, DLP, malware prevention tools
• Experience with cloud security (AWS, Azure, hybrid IaaS/PaaS/SaaS solutions)
• Understanding of authentication & authorisation technologies (SAML, LDAP, PKI)
• Working knowledge of SIEM setup and operations
• Familiarity with MOD / Defence Digital environments (advantageous)
• Excellent documentation, communication, and stakeholder management skills
• Eligible for UK Security Clearance

Nice to have

• Experience working within MOD or Home Office project environments
• Exposure to Agile, DevOps, or SAFe delivery frameworks
• ITIL or CISSP certification
• Salary range: £47,500 - £71,500 depending on experience
• 33 days annual leave (including public and privilege holidays)
• Contributory pension & private medical insurance
• Flexible benefits including life assurance, gym memberships, and cycle-to-work scheme
• Dynamic working – balance office, remote, and on-site collaboration
• Career progression through technical academies, certifications, and structured development plans

Seniority level

Associate

Employment type

Full-time

Job function

Information Technology

Industries

Technology, Information and Internet

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