Cyber Security Jobs

253 jobs for “System And Network Administrator”

Results

CrowdStrike logo

CrowdStrike · 1001–5000 people · Public

Intelligence Intern - Summer 2027

  • Germany
  • Remote
  • Entry level
  • Internship

Internship on CrowdStrike's Technical Analysis Cell, researching nation-state and criminal intrusions through reverse engineering of malware and tooling. The role involves building automation for malware analysis, creating host- and network-based detection signatures, and producing threat intelligence reporting for customers.

CrowdStrike · Disassemblers · Decompilers +1

Yesterday
CrowdStrike logo

CrowdStrike · 1001–5000 people · Public

Incident Response Consultant

  • United Kingdom
  • Remote
  • Mid-level

Lead incident response engagements, hunting adversaries across large data sets and conducting intrusion investigations under outside counsel. Perform host, network and cloud forensics across Windows, Mac and Linux, plus basic malware analysis, and deliver findings to executives, regulators and legal teams.

CrowdStrike · Zeek · Suricata +6

Last week

Amazon · Public

Software Development Engineer - Security Automation, AWS Security Epoxy

  • London
  • Mid-level
  • Permanent

Builds and operates automation platforms that onboard threat detection, remediate security risk and accelerate incident response across every AWS account. Day to day involves designing loosely specified features, writing well-tested Python and TypeScript on AWS services, instrumenting systems for operational excellence, and participating in an on-call rotation. The team runs foundational services at very high scale with a strong 'you build it, you run it' culture.

AWS

3 months ago

Amazon · Public

Software Development Engineer, AWS Security Epoxy

  • London
  • Mid-level
  • Permanent

Builds and operates automation platforms that onboard threat detection, remediate security risk and accelerate incident response across every AWS account. The role spans designing loosely specified features, owning operational health through instrumentation and automation, and participating in an on-call rotation, using AWS services, Python and TypeScript at very high scale.

AWS

3 weeks ago

Ashdown Group

Head of Information Security

  • London
  • On-site
  • £70,000 – £75,000 pa
  • Director · manages people

Lead the information security strategy for a London-based organisation, supported by a Cyber Security Analyst. Own the ISMS aligned to ISO27001, oversee risk assessments, incident response, supplier and auditor relationships, awareness training, disaster recovery testing and internal audits, working closely with senior stakeholders.

3 days ago

Intec Select

Technology Governance & Assurance Manager

  • London
  • £75,000 – £85,000 pa
  • Mid-level

Hands-on ownership of technology governance, cyber security, risk, compliance and assurance frameworks across a diverse technology estate. Leads CIS Controls Self Assessment activities, coordinates ISO 27001 gap assessments and ISMS implementation, maintains security policies and risk registers, and provides assurance reporting to senior stakeholders while coordinating external auditors and suppliers.

CIS CSAT · ISO 27001 · ISMS +2

Yesterday

PRIORY

UK Head of IT Risk & Compliance

  • Bristol
  • Hybrid · 2 days in office
  • £80,000 pa
  • Director · manages people
  • Permanent

Lead the UK information security strategy for a healthcare provider, owning governance, risk and compliance across systems and data. You'll develop the ISMS to ISO 27001, NIST, Cyber Essentials and GDPR standards, run internal and external audits, manage third-party supplier risk and lead incident response, reporting to the UK CIO and working with the Group CISO.

ISO 27001 · NIST · Cyber Essentials +1

Clearance required 2 days ago
Entrust logo

Entrust · 501–1000 people · Late stage

Staff Software Developer

  • Cambridge
  • Hybrid · 3 days in office
  • Senior
  • Permanent

Leads the design and delivery of complex features in a cryptographic security product, working hands-on across embedded software, platform components, client tools and APIs. Sets technical direction, mentors engineers and supports system-level architecture decisions on availability, latency and data models. Hybrid role in Cambridge, three days onsite.

C · Python

Last month
Entrust logo

Entrust · 501–1000 people · Late stage

Senior Software Developer, Entrust Agentic Trust

  • United Kingdom - Field
  • Senior

Designs, builds, tests and operates significant capabilities of the Agentic Trust solution within R&D, delivering complex features across the full software development lifecycle. Develops secure APIs, services, integrations and SDKs, mentors less experienced developers, and troubleshoots production issues. Works with Product, Architecture and Security peers to keep the platform secure, scalable and reliable.

Kubernetes · MCP · LLM

2 weeks ago

Via Match

Governance, Risk & Compliance Specialist

  • Leicester
  • Hybrid · 1 day in office
  • £40,000 – £55,000 pa
  • Mid-level

Day-to-day you will own and improve the ISMS, coordinate internal and external audits, administer the cyber risk register and run supplier assurance and third-party assessments. You will write policies and standards, produce executive reporting and act as a trusted advisor across technology and business teams, with frameworks including NIST CSF 2.0, PCI DSS and UK GDPR.

LogicGate · OneTrust · Archer +1

6 days ago

Mimecast

Senior Solution Architect - Email & Collaboration Security

  • London
  • £124,000 – £186,000 pa
  • Senior

Owns architectural direction for Mimecast's Email & Collaboration Security product line, spanning email threat detection, DMARC, data platforms and response capabilities. Works across product, engineering and the Architecture Leadership Team to define integration contracts, ADRs and NFR targets, with cost-per-outcome reasoning and daily AI tooling use.

AWS · Kafka · MCP +4

Clearance required 3 months ago

TTP

Hardware Security Engineer - Consultant

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

Consultants assess critical systems for cyber-physical vulnerabilities, combining deep hardware research, testing and reverse engineering with rapid prototyping of proof-of-concept demonstrators. Work spans niche defence and national security projects, interfacing with hardware via protocols like JTAG and UART and using test equipment such as oscilloscopes. The role is fully on-site in Cambridge labs within a flat, collaborative ~40-person consultancy.

JTAG · UART · Oscilloscopes

Clearance required 4 months ago

MJA (London) Ltd

Head of Information Security

  • London
  • Director · manages people

Lead and develop the organisation's cyber security strategy, owning the information security framework including ISO 27001 and Cyber Essentials Plus. Reporting to the CIO, you will run security operations, manage an outsourced SOC, oversee incident response and vulnerability management, and mentor the security team. Legal-sector experience is mandatory, and the role spans Microsoft/Azure cloud security and SaaS assurance.

Microsoft Azure · SOC

3 weeks ago

Proactive Appointments

IT Technician

  • Caterham
  • On-site
  • £30,000 – £35,000 pa
  • Mid-level

Provide 1st and 2nd line support across a school, working with the IT Manager to keep systems available and secure. Administer Microsoft 365, Active Directory (Azure and on-prem), Group Policy, Teams, SharePoint, SCCM, Intune, Autopilot and VMware, while supporting data protection and safeguarding compliance.

Microsoft 365 · Active Directory · Azure Active Directory +7

Last month

Experis · 501–1000 people · Late stage

SOC Analyst

  • Winchester
  • On-site
  • £41,000 – £50,000 pa
  • Mid-level

Monitor, triage and investigate security alerts across SIEM and wider security tooling, identifying indicators of compromise and conducting initial incident investigations. Support the full incident response lifecycle including containment, remediation and post-incident learning, while tuning detection rules to reduce false positives. Work with security and infrastructure teams on threat intelligence, trend reporting and continual service improvement.

Microsoft Sentinel · Microsoft Defender · QRadar +2

SC clearance 2 weeks ago

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