Cyber Security Jobs

123 jobs for “Site Reliability Engineer”

Results

Entrust logo

Entrust · 501–1000 people · Late stage

Staff Software QA Engineer, Entrust Agentic Trust

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  • United Kingdom - Field
  • Senior

Senior individual contributor providing cross-team technical leadership for quality engineering across a multi-tenant SaaS platform. Defines automation architecture and risk-based quality strategies, builds reusable test frameworks, and embeds unit, integration, contract, API and end-to-end testing into CI/CD pipelines. Leads performance, scalability and resilience validation, including fault injection and chaos testing, while mentoring engineers and influencing release decisions.

Kubernetes · OAuth 2.0 · mTLS +4

Last week
Entrust logo

Entrust · 501–1000 people · Late stage

Staff Software Developer, Entrust Agentic Trust

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  • United Kingdom - Field
  • Senior

Senior individual contributor providing cross-team technical leadership for the Agentic Trust solution, owning complex problem areas spanning multiple services and platform planes. Remains deeply hands-on, shaping designs, prototyping high-risk capabilities, resolving systemic issues, and creating reusable patterns. Involves identity, delegated authority, policy enforcement, and trustworthy execution, with mentoring and architecture reviews.

MCP · C2PA

Last week

QinetiQ

Cyber Security Consultant

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  • Portsmouth
  • On-site
  • £50,850 – £56,500 pa
  • Mid-level

Advises customers on cyber security vulnerability, risk, audit and compliance, applying NIST and ISO27001 frameworks to risk assessments and security assurance. Supports accreditation, governance and mitigation strategies across government, defence and critical national infrastructure, engaging stakeholders and presenting findings. Based on-site at least three days a week with customer travel required.

NIST · ISO 27001 · MITRE ATT&CK +1

SC clearance Last month

QinetiQ

Cyber Security - eDV Required

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  • Malvern, England, United Kingdom
  • On-site

Join a team delivering offensive security solutions in real-time operational mission environments, planning and executing advanced red team engagements that simulate real-world attacks. The role involves exploiting vulnerabilities across infrastructure, applications and cloud platforms, bypassing defences such as firewalls, EDRs and IDS/IPS, and developing realistic adversary TTPs. Work is fully on-site at the Malvern facility, focused on defence and national security.

AWS · Azure · GCP +7

eDV clearance 3 weeks ago

Airbus · 10000+ people · Public

IT Product Manager – Digital Workplace - IP Telephony (d/f/m)

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  • Toulouse, France
  • Mid-level · manages people
  • Permanent

Owns the global IP telephony product across Airbus Defence and Space, covering strategy, lifecycle management, operations and decommissioning under ITIL. Leads an international support team, manages CAPEX/OPEX budgets and external service contracts, and validates product readiness for Cisco-based softphone, fixed telephony and instant messaging services in a highly regulated, on-premise environment.

Cisco · Softphone · Instant Messaging

Clearance required Last week

Tatton Recruitment

Windows Engineer (DV Security Clearance)

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  • Stevenage
  • On-site
  • £74 ph
  • Mid-level
  • Contract

Operational BAU support, administration and configuration management across Infrastructure and Workplace Windows environments on restricted secret and above networks. The role covers patching, change implementation, Tier 2/3 incident response, root cause analysis, monitoring and 3rd party liaison, and is 100% site-based due to the network's nature.

Windows Server · Windows OS · VDI +1

DV clearance Last week

Vantage

OT Cyber Security Engineer

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  • Reading
  • £60,000 – £70,000 pa
  • Lead

Hands-on technical ownership of OT cybersecurity delivery across automation and systems integration projects, covering PLC, HMI, SCADA, servers and industrial networks. Involves designing secure OT networks with managed switches and firewalls, producing risk assessments and documentation, and applying IEC 62443 and NIS standards through testing and client handover.

Rockwell · Siemens · AVEVA +4

2 weeks ago

South Wales Police

ICT Cloud Infrastructure and Platforms Specialist

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  • Bridgend
  • £47,046 – £55,696 pa

Job Title: ICT Cloud Infrastructure and Platforms SpecialistLocation: South Wales Police Headquarters, Bridgend, WalesSalary: £47,046 - £55,696 per annumJob Type: Full Time, PermanentWorking Hours: 37 hours per weekClosing Date: 03/11/2026, 15:00Are you looking for your next career step?Do you want…

Last month

Avanti Recruitment

Cyber Security Analyst: Career Path to Architect

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  • London
  • Hybrid · 2–3 days in office
  • £50,000 – £75,000 pa
  • Mid-level

Client-facing security role within a UK consultancy's growing Security Architecture practice, supporting government, defence and critical infrastructure programmes. Day to day involves threat modelling, risk assessment, reviewing solution and infrastructure designs, defining security requirements and controls, and running client workshops. Suits security engineers or consultants wanting to move into architecture, with occasional client site visits rather than frequent travel.

NIST · SABSA · TOGAF +5

SC clearance Last month

Tank Recruitment

Security Architect

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  • Reading
  • Remote
  • Senior

Designs, develops and reviews secure architectures across cyber security, cloud and enterprise environments for defence customers, using AWS and/or Azure. Acts as a trusted technical adviser, producing architecture documentation, security assurance artefacts and risk assessments while engaging directly with customer stakeholders and attending occasional site visits.

AWS · Azure

SC clearance Yesterday

Hays Technology

Head of IT

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  • Chessington
  • Hybrid
  • Director · manages people
  • Permanent

Lead the IT function across a multi-site FMCG business, assessing the existing technology estate and transitioning away from services provided by the former parent group. Own infrastructure, cloud, enterprise applications (notably D365 Business Central), cybersecurity governance and supplier relationships, while building a roadmap and developing the IT team.

Microsoft Dynamics 365 Business Central · Azure · Microsoft 365 +3

3 weeks ago

Deerfoot Recruitment Solutions

Head of Information Security

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  • London
  • Hybrid · 2 days in office
  • £75,000 – £125,000 pa
  • Director

A senior, hands-on individual-contributor role setting information security direction for an international organisation, reporting to the Global Head of Technology. You will define standards and proportionate controls, challenge network, infrastructure and cloud configurations, and provide oversight of vulnerability management, monitoring and incident response, with no security team to manage.

Microsoft 365 · Azure · NIST CSF +3

Last month

Michael Page

Senior Infrastructure Lead

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  • Manchester
  • Hybrid
  • £60,000 – £70,000 pa
  • Lead

Owns the Group's infrastructure estate across Microsoft 365, Azure, networks, security and end-user services, defining the technology roadmap and leading modernisation and transformation initiatives. Acts as primary technical owner of the MSP and key suppliers, driving resilience, identity and endpoint security, and multi-site networking. Hybrid role in Manchester within a growing property investment business.

Microsoft 365 · Azure · Entra ID +7

Last month

Matchtech

DV cleared - Windows Engineer

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  • Stevenage
  • On-site
  • £67 – £74 ph
  • Senior
  • Contract

Operational support, administration and configuration management across Infrastructure and Workplace Windows environments for a defence client, including patching, change management and asset/inventory auditing. Acts as Tier 2/Tier 3 escalation for Windows incidents, performing incident response, root-cause analysis and remediation within highly restricted, fully on-site environments.

Windows Server · Windows OS · Active Directory

DV clearance Last month

Airbus · 10000+ people · Public

Ground System Security Design Engineer

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  • Chippenham
  • Hybrid
  • Senior
  • Permanent

Provide end-to-end cyber security support for Spacecraft Control Centre Systems and Satellite Communications infrastructures, analysing functional needs, setting criticality levels and proposing protection concepts. Coordinate security architecture across disciplines, manage risks and ensure defences stay ahead of evolving threats. Requires CISSP/CISM and hands-on knowledge of Solaris, Linux, Windows, Cisco and JSP440.

Solaris · Linux · Windows +1

SC clearance 2 months ago

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