Cyber Security Jobs

• London
• €66,000 – €91,000 pa
• Senior

Builds and operates microservices behind Cloudflare's Application Security products such as Rate Limiting and Web Application Firewall, working mainly in Rust and Go with Docker, Kubernetes, PostgreSQL, Kafka and Clickhouse. Senior engineers lead complex projects from design through production, mentor peers, and improve reliability of distributed systems at global scale, with on-call flexibility required.

Rust · Go · C++ +7

• London
• Hybrid
• Mid-level

Builds new features and systems for Cloudflare's edge web server, focusing on the rules engine and its control plane. Works in Rust and Go on large-scale distributed systems, performance engineering, and reliability across a platform handling over 100 million HTTP requests per second.

Rust · Go · Cloudflare

• Ireland
• Remote
• Senior
• Permanent

Owns major components of the Windows kernel-mode sensor, architecting and building next-generation anti-virus and EDR security software. Works across core OS subsystems like file system, memory, process and networking, with cross-platform deliverables for Windows, Mac and Linux. Leads projects end to end, mentoring and collaborating with distributed teams.

Windows · Mac · Linux +2

• United Kingdom
• Remote
• Senior
• Permanent

Owns major components of the Windows kernel-mode endpoint sensor, architecting and building anti-virus and EDR features that span file system, memory, process and networking subsystems. Leads projects from design to delivery, mentors engineers and collaborates with distributed, cross-platform teams on shared Windows, Mac and Linux components.

Windows · Mac · Linux +1

• London
• Hybrid · 2–3 days in office
• £90,000 – £100,000 pa
• Senior

Owns and matures security operations across cloud, endpoint and SaaS environments, covering detection engineering, incident response, vulnerability management and AWS/GCP security posture. Over time shifts toward security engineering and architecture, designing scalable telemetry and detection platforms and embedding secure-by-design principles with engineering teams.

AWS · GCP · SIEM +7

• Manchester
• Hybrid · 2–3 days in office
• £90,000 – £100,000 pa
• Senior

Delivering OT security assessments, audits and gap analyses for clients in energy, manufacturing, oil & gas and pharmaceuticals. The role involves evaluating OT networks, systems and controls, then shaping security strategies, policies and improvement roadmaps as a trusted client-facing advisor. Knowledge of IEC 62443 and NIST frameworks is beneficial.

SCADA

• London
• Hybrid · 2–3 days in office
• £90,000 – £100,000 pa
• Mid-level

Conducts OT security assessments, audits and risk assessments for clients in energy, manufacturing, oil & gas and pharmaceuticals. Reviews OT networks, systems and controls, identifies vulnerabilities and develops security policies, procedures and roadmaps while advising clients on frameworks such as IEC 62443 and NIST.

SCADA · IEC 62443 · NIST

• Reading
• Hybrid
• £72,000 pa

Supports the design, implementation and maintenance of threat and vulnerability management controls across a large water utility's IT estate. Conducts network, application and code penetration testing, exploits vulnerabilities via proof-of-concept testing, and helps build an internal pen testing function. Works hybrid in Reading, liaising with Digital teams on remediation, patching and threat hunting.

Tenable · Burp Suite · Kali Linux +2

• Farnborough
• Hybrid
• Senior
• Permanent

Lead protective and information security engineering on a critical MOD programme, shaping secure designs, assuring controls, and managing vulnerabilities across infrastructure, endpoints, identity and AWS cloud. Combines hands-on hardening, incident response leadership and ST&V with governance, reporting and mentoring, working largely autonomously on-site in Farnborough with some remote work.

AWS

• Lincolnshire
• Hybrid
• £55,000 pa
• Senior

Lead the design, implementation and governance of OT network and security across multiple manufacturing sites, working alongside the Global Head of IT Operations. Act as subject matter expert for industrial networks, SCADA, PLCs, ICS and network risk assessment, securing and modernising environments while ensuring availability and resilience of business systems.

SCADA · PLC · VPN +3

• London
• Remote
• Lead · manages people

Lead strategic advisor for enterprise customers modernising their Security Operations Centres through XSIAM deployment, covering log ingestion, detection engineering and automation. The role combines executive-level consulting with hands-on SIEM/SOAR/EDR technical work, mentoring professional services teams and feeding field insights back to Product and R&D. Requires security clearance eligibility and up to 30% travel.

XSIAM · Splunk · IBM QRadar

• Manchester
• Remote
• Mid-level
• Permanent

Monitor, detect and respond to cyber incidents for customers from a 24/7 Global Security Operations Centre, working with the Microsoft Security Stack, Splunk, EDR, IDS and IPS tools integrated into a Unified Cyber Platform. The L2 role sits within an MXDR team of over 100 accredited experts handling hundreds of millions of log events daily.

Microsoft Security Stack · Splunk · EDR +3

• Lincoln
• Hybrid
• £55,000 pa
• Senior

Lead the design, implementation and governance of OT network and security across multiple manufacturing sites, working alongside the Global Head of IT Operations. Act as subject matter expert for SCADA, PLCs, ICS networks and industrial protocols, securing and modernising environments while ensuring availability and resilience of business systems.

SCADA · PLC · ICS Networks +4

• Leeds
• Hybrid · 3 days in office
• £45,000 – £50,000 pa
• Mid-level
• Permanent

Support the development and operation of security controls, analyse threat intelligence, manage vulnerabilities and help with incident response across a global technology estate. Work with Azure and Microsoft security tooling such as Sentinel, Defender and Intune, alongside SIEM, EDR and firewalls, in a hybrid Leeds team.

Microsoft Azure · Microsoft Sentinel · Microsoft Defender for Endpoint +7

• London
• Mid-level

Deploy, integrate and optimise AI-driven cybersecurity across network, cloud, OT and email environments for post-sales customers. Handle deployment projects to SLOs, resolve support tickets and act as a trusted advisor on security infrastructure design, liaising with sales, customer success and operations.

AWS · Microsoft · Cisco +2