Cyber Security Jobs

• United Kingdom - Field (Onfido)
• Senior

Customer-facing role leading enterprise onboarding and implementation of identity and security solutions, guiding customer engineering teams through design, integration, testing and go-live. Involves hands-on troubleshooting of REST APIs, mobile and web SDKs, log and API traffic analysis, and advising on performance, scalability and security. Requires independently managing multiple concurrent engagements and mentoring junior team members.

REST APIs · Android Studio · Xcode +7

• London
• Permanent

Lead the design of physical security elements such as cameras, access control, intrusion detection, fences and gates for data centre projects, producing construction drawings and specifications in Revit and CAD. Coordinate security requirements across architectural, mechanical, electrical, civil and IT disciplines, and act as subject matter expert reviewing third-party and in-house design deliverables. Manage multiple fast-paced projects with travel up to 25%.

Bluebeam · Revit · AutoCAD +1

• London
• Mid-level
• Permanent

Respond to security incidents across AWS cloud services, triaging issues and driving internal teams to timely remediation while balancing technical and business risk. Build internal automation tools and utilities, mentor junior staff, and share on-call responsibilities. Works within AWS Cloud Response, coordinating multi-team responses and publishing guidance for customer-impacting issues.

AWS

• Newbury
• Senior

Monitors and manages network equipment and infrastructure for customer services across EMEA and North America, with a strong focus on firewall and network security administration. Day-to-day work covers Cisco ASA, Firepower and Palo Alto firewalls, VMware vSphere and NetApp storage, plus automation and out-of-hours support on a rota.

Cisco ASA · Cisco Firepower Threat Defense · Palo Alto PA-Series +7

• Boston, United States
• Remote
• £140,000 – £215,000 pa
• Lead · manages people

Lead a team of engineers building self-service infrastructure-as-code primitives, high-availability services and cloud cost optimization across a multi-cloud environment. The role combines people management with hands-on architecture of large-scale distributed systems, using tools like Terraform, Pulumi, Chef and Python or Go, with a strong SRE and GitOps focus.

Chef · Puppet · Salt +7

• Arlington, United States
• Remote
• £140,000 – £215,000 pa
• Senior · manages people

Lead a team building the foundational platform behind CrowdStrike's massive-scale cloud infrastructure, architecting core services and driving cloud cost optimization across AWS and GCP. The role blends people management with hands-on technical direction, setting deployment standards and SRE practices in a multi-cloud, Linux-based environment.

Chef · Puppet · Salt +7

• London
• On-site
• Senior

Provide advanced technical support for Cortex XSIAM customers, triaging tickets, calls and escalations within SLAs and performing application- and OS-level troubleshooting. Work with developers to reproduce issues and implement permanent fixes, and with technical account managers to mitigate risk in customer environments. Requires SIEM, EDR and endpoint security expertise plus UK security clearance.

Cortex XSIAM · Kubernetes · GCP +10

• United Kingdom
• Remote
• Senior

Provide advanced technical support for Cortex XSIAM customers, triaging issues via ticketing, phone and remote sessions, and performing application- and OS-level troubleshooting. Work with developers to reproduce faults and implement permanent fixes, and with technical account managers to mitigate risks in customer environments.

Cortex XSIAM · Kubernetes · GCP +10

• London

Design, develop and maintain secure Linux software using C++, Python and Bash, with a strong focus on system-level programming and security engineering. Work spans Linux internals, OpenSSL, X.509/PKI, seccomp, udev, auditd and system hardening, applying secure-by-design principles across the development lifecycle. The role suits an engineer who enjoys working close to the OS on security-sensitive endpoint technology.

Linux · Debian · OpenSSL +7

• Cambridge
• On-site
• £80,000 – £100,000 pa
• Senior
• Permanent

Owns software security strategy, architecture and standards across a diverse product portfolio, embedding threat modelling and secure-by-design into the full lifecycle. Works with engineering and product teams on architecture reviews, vulnerability management, CI/CD security and release criteria, plus EU Cyber Resilience Act compliance. Desirable background includes embedded systems, IoT, Android and embedded Linux.

Android · Embedded Linux

• Cobridge
• On-site
• £45,000 – £55,000 pa
• Senior · manages people
• Permanent

Owns the day-to-day technology environment for an engineering and manufacturing business, covering infrastructure management, systems and database administration, cybersecurity, ERP and global support. Leads and mentors an IT team, runs projects such as system upgrades and software implementations, manages budgets and vendors, and ensures compliance and disaster recovery across UK and international offices.

Microsoft Dynamics AX · Jira · Confluence

• Dublin, Ireland
• Hybrid
• Senior · manages people
• Permanent

Lead a small defensive security team accountable for detection, investigation and response across cloud, endpoint, identity and SaaS estates, while managing an outsourced monitoring partner and driving measurable improvement. The role owns serious incident response, detection tuning and a plan for AI and automation in the SOC, working alongside a separate leader focused on engineering and architecture.

Microsoft

• Bristol
• £45,641 – £59,390 pa
• Mid-level
• Contract

Carry out innovative research and teaching in cyber security, focusing on software or systems security, across undergraduate, postgraduate and CDT programmes. Contribute to the Bristol Cyber Security Group's research activities and act as an active member of the group, School and Faculty. Fixed-term post until 31/01/2028 or the substantive postholder's return.

• Washington
• £50,000 – £60,000 pa

Support and improve business systems, processes, reporting and technology solutions across a growing manufacturing company. Deliver digital transformation initiatives including automation and AI-enabled improvements, while maintaining databases, software applications, dashboards and integrations. Provide user support, training and technical guidance, ensuring systems stay secure and compliant.

Microsoft 365 · SQL Server · Microsoft

• Cambridge
• On-site
• Mid-level
• Permanent

Consultants assess critical systems for vulnerabilities, building proof-of-concept demonstrators that combine software, hardware and user interaction. The role spans reverse engineering, low-level programming and rapid prototyping for UK defence and national security clients, working on-site alongside around 40 scientists and engineers.