Cyber Security Jobs

CrowdStrike · Reading

A customer-facing technical role supporting the Value Selling sales play through TDDs, POVs, RFIs and RFPs, architecting and demonstrating complex security solutions. The position also involves competitive research, internal enablement sessions, technical documentation, and mentoring junior Sales Engineers, with a focus on the Falcon platform and incident response, forensics or security analytics.

CrowdStrike · United Kingdom

Senior consultants lead front-page incident response investigations for Fortune 100 clients, conducting host and network forensics across Windows, Mac and Linux and hunting adversaries in large data sets. Work is directed by project leadership and outside counsel, producing written and verbal findings for executives, regulators and legal teams.

Darktrace · Cambridge

Backend engineering role focused primarily on TypeScript, prototyping and building new features for AI-driven cybersecurity products. You'll work with a cross-functional team of engineers, designers and strategists, using Docker and cloud environments, with opportunities to specialise across languages like Python, Rust and C++. Hybrid, requiring at least two days a week in the Cambridge office.

Darktrace · Cambridge

Contributes to security research projects spanning rapid prototyping and open-ended initiatives, with a focus on generative AI systems. Investigates attacker tradecraft such as prompt injection, poisoning and extraction attacks, and provides feedback to product, development and machine learning teams. Hybrid role requiring two days a week in the London or Cambridge office.

Cloudflare · London

Builds and maintains a Chromium-based browser engine, remote rendering and streaming tech, and distributed services that run browser sessions across a global network. Day-to-day work spans C++ browser code, Go/Rust/TypeScript services, debugging across browser processes and Linux hosts, and improving latency and reliability, with production on-call.

Cloudflare · London

Acts as primary technical responder for premium enterprise customers, autonomously investigating complex threat telemetry and handling live incident response for volumetric DDoS and application-layer attacks. Implements mitigation across OSI Layers 3, 4 and 7 using Cloudflare's security suite, performs packet and traffic flow analysis, and advises customers during active incidents. Requires 24x7 rotating shifts.

Mimecast · London · £44,000 – £66,000 pa

Acts as the trusted technical advisor for a portfolio of mid-market accounts, working in a three-person pod with an Account Manager and Renewals Manager. Owns platform adoption, configuration health and value scoring across email security, HRM and Incydr products, and packages proof-of-value and business reviews for executive audiences. Also leads churn mitigation and identifies expansion signals ahead of renewal.

Sizewell C · London · £66,866 pa

Owns end-to-end delivery, performance and continual improvement of enterprise IT services for a major nuclear energy programme, spanning Microsoft 365, Azure, infrastructure, networks, applications and cyber security operations. Combines technical leadership with ITIL service management, supplier governance and regulatory compliance, acting as escalation point for senior stakeholders and managing multiple managed service providers.

Sophos · United Kingdom

Hands-on engineering role managing a modern identity stack across the full lifecycle, from passwordless authentication and adaptive access controls to identity governance and non-human identities. You will configure and operate Microsoft Entra ID, Saviynt and Active Directory directly, integrate applications via SAML, OIDC, OAuth and SCIM, and join an out-of-hours support rota.