Cyber Security Jobs

253 jobs for “System And Network Administrator”

Results

CrowdStrike logo

CrowdStrike · 1001–5000 people · Public

Incident Response Sr. Consultant

  • Spain
  • Remote
  • Senior

Senior technical consultant conducting front-page incident response investigations for Fortune 100 organisations, hunting adversaries across large data sets and performing host and network forensics on Windows, Mac and Linux. Works under project leadership and outside counsel, producing written and verbal findings for executives, regulators and legal counsel.

CrowdStrike · Bro/Zeek · Suricata +6

Last week
CrowdStrike logo

CrowdStrike · 1001–5000 people · Public

Incident Response Sr. Consultant

  • Ireland
  • Remote
  • Senior

Senior consultants lead front-page incident response investigations for Fortune 100 organisations, hunting adversaries across large data sets and conducting host and network forensics on Windows, Mac and Linux. The role involves intrusion analysis under project leadership and outside counsel, plus written and verbal reporting to executives, regulators and legal teams.

CrowdStrike · Bro/Zeek · Suricata +6

Last week

Amazon · Public

Senior Security Engineer, AWS Security Verification & Validation Team

  • Virtual Location - Uk
  • Senior
  • Permanent

Leads complex security testing engagements end-to-end across interconnected AWS microservice architectures, performing penetration testing and AI-augmented source code review. Investigates high-consequence risk hypotheses to documented conclusions, builds reusable mechanisms like fuzzers and detection rules, and mentors engineers while setting the team's peer-review bar.

AWS · Agentic AI

Last month

Red Dot Search UK Limited

Head of IT Operations

  • Bolton
  • Hybrid
  • £60,000 – £75,000 pa
  • Director · manages people

Lead IT operations across two Bolton sites and home workers for an FCA-regulated financial services business, managing the service desk and infrastructure team while staying hands-on with complex projects and major incidents. Own SLAs, change management, security, backup and DR, and the IT budget, working with Windows Server, Hyper-V, Microsoft 365, networking and Veeam.

Jira Service Management · Windows Server · Hyper-V +7

Last week

Hays Technology

Security Architect

  • London
  • Senior

Shapes and strengthens security architecture across a cloud-native environment, working closely with Architecture, Engineering, Product and Operations teams. Focuses on GCP and Kubernetes security, DevSecOps, application and API security, identity, resilience and compliance, influencing technical decisions rather than just reviewing designs.

GCP · Kubernetes · API Gateways +4

Last week

Additional Resources

Senior Application Security Engineer / DevSecOps Engineer

  • London
  • Hybrid
  • £80,000 – £90,000 pa
  • Senior
  • Permanent

Hands-on application security role embedding security across the SDLC, working with engineering, architecture and cloud teams. Involves application security testing (SAST, DAST, IAST, SCA), securing CI/CD pipelines and GitHub Actions, API and Kubernetes/AKS security, plus security-as-code and automation using Terraform and Python. Requires Azure and KQL expertise within a health research charity.

Microsoft Azure · KQL · GitHub +7

3 weeks ago
Entrust logo

Entrust · 501–1000 people · Late stage

Director Software Development, Entrust Agentic Trust

  • United Kingdom - Field
  • Director · manages people

Leads the R&D organisation building the Entrust Agentic Trust platform, translating a four-plane reference architecture into development strategy, operating model and roadmap. Accountable for engineering execution, quality, security and delivery predictability across cloud-native services, APIs, SDKs, policy and authorization components, and tamper-evident evidence systems. Partners with Product, Architecture, Security and Cloud Operations, and builds a multi-discipline software organisation.

FIPS 140-3 · Common Criteria · SOC 2 +4

2 weeks ago
Entrust logo

Entrust · 501–1000 people · Late stage

Senior Implementation Consultant

  • 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

2 weeks ago

Chartered Society of Physiotherapy

Head of Technology

  • London
  • Hybrid
  • £78,131 pa
  • Director · manages people
  • Permanent

Lead the technology strategy, ICT operations and service delivery for a professional body and trade union, working with the Leadership Team and Digital Board. The role covers architecture, cyber security, information governance, operational resilience, supplier relationships and technology investment, while developing a high-performing, customer-focused team. It champions responsible adoption of AI and digital innovation to enable wider digital transformation.

3 days ago

Darktrace · 2001–5000 people · Late stage

Specialist Software Engineer

  • Cambridge
  • Hybrid · 2 days in office
  • Senior

Works within Cambridge R&D teams on high-impact projects spanning rapid prototyping and structured platform development, providing expert technical direction and mentoring engineers across languages such as Python, JavaScript, Rust and C++. The role advances a unique methodology for defending against unknown cyber-attacks, using Docker, cloud environments and CI/CD pipelines, and involves engaging with executive leadership on technical strategy.

Docker · Git · Cloud Computing

2 months ago

Darktrace · 2001–5000 people · Late stage

Specialist Software Engineer

  • London
  • Hybrid · 2 days in office
  • Senior

Joins R&D teams to build and enhance cybersecurity products, providing technical direction across rapid prototyping and structured platform development. Involves advancing malware-defence methodology, mentoring engineers in Python, JavaScript, Rust and C++, and working with Docker, cloud environments and CI/CD pipelines. Hybrid role with two days a week in the Cambridge office.

Docker · Git · Cloud Computing

2 months ago

VIQU IT

Cyber Assurance Lead (Cloud & AI)

  • Belfast
  • Hybrid
  • £80,000 – £100,000 pa
  • Lead
  • Permanent

Independent assurance voice across a sovereign AI platform's cloud estate, corporate environment and AI capability. Sets security baselines for DevOps, IT and Product Security Engineering, then verifies them through continuous monitoring and independent testing, including AI controls such as prompt injection defences and agent permissions. One of the founding roles in a scaling assurance function, working with defence and government customers.

Wiz · ISO 42001 · EU AI Act +4

SC clearance 3 weeks ago

83zero

Cyber Security Manager

  • London
  • Hybrid
  • £100,000 – £118,000 pa
  • Senior
  • Permanent

Lead cybersecurity advisory engagements for a global IT consultancy, covering risk assessments, maturity reviews, strategy and transformation roadmaps. Advise CISOs and CTOs, embed security into cloud and digital transformation programmes, and support bids and business development while mentoring junior consultants.

SC clearance 3 weeks ago

Hays Technology

Cyber Security Specialist

  • Greater Manchester
  • Hybrid
  • £40,000 – £46,500 pa
  • Mid-level
  • Permanent

Hands-on security role covering SIEM, EDR, email security and vulnerability platforms, plus IDS/IPS monitoring and incident investigation. You'll embed security into project lifecycles and SDLC, work with an MSP on alert management, and support Cyber Essentials and ISO 27001 governance and third-party risk assurance.

SIEM · EDR · XDR +2

Last week

Ricoh

Application Security Consultant

  • London
  • Mid-level

Acts as a technical authority leading application security reviews for high-risk products, running SAST, DAST, API security and fuzz testing, and assessing against the OWASP Top 10. Embeds shift-left security into CI/CD pipelines and secure coding practices across Java, C, C++ and other languages, while advising developers, architects and product owners across Ricoh Europe.

Java · C · C++ +7

2 weeks ago

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