76 to 100 of 120 Offensive Security Jobs in the UK

Security Triage Analyst

Location
Greater London, England, United Kingdom
often treated as queue work: read the report, check the scope, set a severity, move it on. We are building this role differently. As Security Triage Analyst you own the first layer of judgement on every report that reaches Verda – what is real, what matters, what needs more evidence … report that looks routine elsewhere can matter more here because of tenant isolation, customer impact, or infrastructure access. You will work closely with Security, Engineering, Infrastructure, external triage partners, and researchers, and you will help improve how vulnerability handling works as the volume grows. Your responsibilities Review incoming reports ...

Senior Account Executive, EMEA Commercial

Location
Greater London, England, United Kingdom
Continuous Threat Exposure Management (CTEM). The HackerOne Platform unites agentic AI solutions with the ingenuity of the world’s largest community of security researchers to continuously discover, validate, prioritize, and remediate exposures across code, cloud, and AI systems. Through solutions like bug bounty, vulnerability disclosure, agentic pentesting … teaming, and code security, HackerOne delivers measurable, continuous reduction of cyber risk for enterprises. Industry leaders, including Anthropic, Crypto.com, General Motors, Goldman Sachs, Lufthansa, Uber, UK Ministry of Defence, and the U.S. Department of Defense, trust HackerOne to safeguard their digital ecosystems. HackerOne was recognized in Gartner’s Emerging ...

Managing Consultant – Cyber Security

Location
Nottingham, England, United Kingdom
strengthening our global presence, and building strong client relationships. No career pathway in your current role? You won’t stand still in our Cyber Security team which is a part of our wider Technology & Cyber Risk Assurance team. You’ll work with our team of specialists … spot inefficiencies in everyday life and are passionate about making improvements, this role is perfect for you! Relevant experience within a technology risk, information security or cyber security role. Significant experience delivering cyber security assurance and advisory services. Proven experience in managing engagements ...

Application Security Engineer

Location
Manchester, England, United Kingdom
looking for a Application Security Engineer to join our Manchester-based application security business as a member of the AppSec Engineering team (Open to people who can make it to our office twice a month or remote) Cytix is a platform that threat models development tickets and creates … security testing plans that include both manual and automated testing. In this role, you won't be confined to traditional 4+1 web applications. We're breaking away from the constraints of CHECK or CE+ standards, and we're not interested in producing lengthy PDF reports. Instead, our focus ...

Senior Detection and Response Engineer

Location
Cambridge, England, United Kingdom
Lead investigations into escalated security events and incidents, developing hypotheses, collecting evidence and determining root cause and impact. Build and optimise detection rules, queries and monitoring logic across cloud, endpoint, network and application environments. Develop tooling and automation to improve security telemetry, alert enrichment, investigation workflows and response … times. Conduct threat hunting using adversary behaviours, TTPs and frameworks such as MITRE ATT&CK, incorporating findings into security controls and detections. Create and continuously improve incident runbooks, playbooks and detection processes based on findings from real-world investigations. Work with the external SOC and internal engineering teams ...

Senior Mobile Offensive Security Engineer

Location
Greater London, England, United Kingdom
Klarna seeks an experienced offensive mobile security specialist to protect its iOS and Android apps. You will conduct pentests and red-team exercises, reverse-engineer binaries, and apply MASVS/MASTG guidance to drive concrete engineering fixes. You will collaborate with software engineers to harden app security, test RASP protections, and document actionable remediation steps. This role requires hands-on testing across mobile platforms and a track record of security research or bug bounty work. #J-18808-Ljbffr ...

GreyMatter Specialist

Location
Harrow, England, United Kingdom
ReliaQuest, we do things differently. We do not limit your professional growth with outdated job titles and responsibilities. Why be just a “Security Analyst”, “Detection Developer”, or “Security Engineer” when you can be all three? As a GreyMatter Specialist, you will do all of that and more. This … this role, you’ll develop a diverse skill set which normally takes years to learn—all within your first year. Our industry-leading security operations platform, GreyMatter and immersive training will afford you the tools, experience, and opportunities to grow your career. Whether you’re conducting advanced investigations, troubleshooting ...

Penetration Tester

Location
Nottingham, England, United Kingdom
Security Consultant (Penetration Testing) Location: Hybrid (UK) Salary: Competitive + Benefits Security Clearance: Current SC preferred About Citation Cyber Citation Cyber is one of the UK's leading cyber security consultancies, delivering penetration testing, Cyber Essentials certification, consultancy, training and managed cyber security services to organisations … NCSC CHECK provider and CREST member company , we're continuing to grow our penetration testing team and are looking for a talented Security Consultant to join us. Whether you're already a CHECK Team Member (CTM) or you're an experienced penetration tester ready to take that next step ...

Penetration Tester

Location
Slough, England, United Kingdom
Security Consultant (Penetration Testing) Location: Hybrid (UK) Salary: Competitive + Benefits Security Clearance: Current SC preferred About Citation Cyber Citation Cyber is one of the UK's leading cyber security consultancies, delivering penetration testing, Cyber Essentials certification, consultancy, training and managed cyber security services to organisations … NCSC CHECK provider and CREST member company , we're continuing to grow our penetration testing team and are looking for a talented Security Consultant to join us. Whether you're already a CHECK Team Member (CTM) or you're an experienced penetration tester ready to take that next step ...

Penetration Tester

Location
Basingstoke, England, United Kingdom
Security Consultant (Penetration Testing) Location: Hybrid (UK) Salary: Competitive + Benefits Security Clearance: Current SC preferred About Citation Cyber Citation Cyber is one of the UK's leading cyber security consultancies, delivering penetration testing, Cyber Essentials certification, consultancy, training and managed cyber security services to organisations … NCSC CHECK provider and CREST member company , we're continuing to grow our penetration testing team and are looking for a talented Security Consultant to join us. Whether you're already a CHECK Team Member (CTM) or you're an experienced penetration tester ready to take that next step ...

Penetration Tester

Location
Cardiff, Wales, United Kingdom
Security Consultant (Penetration Testing) Location: Hybrid (UK) Salary: Competitive + Benefits Security Clearance: Current SC preferred About Citation Cyber Citation Cyber is one of the UK's leading cyber security consultancies, delivering penetration testing, Cyber Essentials certification, consultancy, training and managed cyber security services to organisations … NCSC CHECK provider and CREST member company , we're continuing to grow our penetration testing team and are looking for a talented Security Consultant to join us. Whether you're already a CHECK Team Member (CTM) or you're an experienced penetration tester ready to take that next step ...

Penetration Tester

Location
Norwich, England, United Kingdom
Security Consultant (Penetration Testing) Location: Hybrid (UK) Salary: Competitive + Benefits Security Clearance: Current SC preferred About Citation Cyber Citation Cyber is one of the UK's leading cyber security consultancies, delivering penetration testing, Cyber Essentials certification, consultancy, training and managed cyber security services to organisations … NCSC CHECK provider and CREST member company , we're continuing to grow our penetration testing team and are looking for a talented Security Consultant to join us. Whether you're already a CHECK Team Member (CTM) or you're an experienced penetration tester ready to take that next step ...

Penetration Tester

Location
Cambridge, England, United Kingdom
Security Consultant (Penetration Testing) Location: Hybrid (UK) Salary: Competitive + Benefits Security Clearance: Current SC preferred About Citation Cyber Citation Cyber is one of the UK's leading cyber security consultancies, delivering penetration testing, Cyber Essentials certification, consultancy, training and managed cyber security services to organisations … NCSC CHECK provider and CREST member company , we're continuing to grow our penetration testing team and are looking for a talented Security Consultant to join us. Whether you're already a CHECK Team Member (CTM) or you're an experienced penetration tester ready to take that next step ...

Penetration Tester

Location
Guildford, England, United Kingdom
Security Consultant (Penetration Testing) Location: Hybrid (UK) Salary: Competitive + Benefits Security Clearance: Current SC preferred About Citation Cyber Citation Cyber is one of the UK's leading cyber security consultancies, delivering penetration testing, Cyber Essentials certification, consultancy, training and managed cyber security services to organisations … NCSC CHECK provider and CREST member company , we're continuing to grow our penetration testing team and are looking for a talented Security Consultant to join us. Whether you're already a CHECK Team Member (CTM) or you're an experienced penetration tester ready to take that next step ...

Penetration Tester

Location
Bath, England, United Kingdom
Security Consultant (Penetration Testing) Location: Hybrid (UK) Salary: Competitive + Benefits Security Clearance: Current SC preferred About Citation Cyber Citation Cyber is one of the UK's leading cyber security consultancies, delivering penetration testing, Cyber Essentials certification, consultancy, training and managed cyber security services to organisations … NCSC CHECK provider and CREST member company , we're continuing to grow our penetration testing team and are looking for a talented Security Consultant to join us. Whether you're already a CHECK Team Member (CTM) or you're an experienced penetration tester ready to take that next step ...

Penetration Tester

Location
Chester, England, United Kingdom
Security Consultant (Penetration Testing) Location: Hybrid (UK) Salary: Competitive + Benefits Security Clearance: Current SC preferred About Citation Cyber Citation Cyber is one of the UK's leading cyber security consultancies, delivering penetration testing, Cyber Essentials certification, consultancy, training and managed cyber security services to organisations … NCSC CHECK provider and CREST member company , we're continuing to grow our penetration testing team and are looking for a talented Security Consultant to join us. Whether you're already a CHECK Team Member (CTM) or you're an experienced penetration tester ready to take that next step ...

Penetration Tester

Location
Birmingham, England, United Kingdom
Security Consultant (Penetration Testing) Location: Hybrid (UK) Salary: Competitive + Benefits Security Clearance: Current SC preferred About Citation Cyber Citation Cyber is one of the UK's leading cyber security consultancies, delivering penetration testing, Cyber Essentials certification, consultancy, training and managed cyber security services to organisations … NCSC CHECK provider and CREST member company , we're continuing to grow our penetration testing team and are looking for a talented Security Consultant to join us. Whether you're already a CHECK Team Member (CTM) or you're an experienced penetration tester ready to take that next step ...

Penetration Tester

Location
Bradford, England, United Kingdom
Security Consultant (Penetration Testing) Location: Hybrid (UK) Salary: Competitive + Benefits Security Clearance: Current SC preferred About Citation Cyber Citation Cyber is one of the UK's leading cyber security consultancies, delivering penetration testing, Cyber Essentials certification, consultancy, training and managed cyber security services to organisations … NCSC CHECK provider and CREST member company , we're continuing to grow our penetration testing team and are looking for a talented Security Consultant to join us. Whether you're already a CHECK Team Member (CTM) or you're an experienced penetration tester ready to take that next step ...

Penetration Tester

Location
Watford, England, United Kingdom
Security Consultant (Penetration Testing) Location: Hybrid (UK) Salary: Competitive + Benefits Security Clearance: Current SC preferred About Citation Cyber Citation Cyber is one of the UK's leading cyber security consultancies, delivering penetration testing, Cyber Essentials certification, consultancy, training and managed cyber security services to organisations … NCSC CHECK provider and CREST member company , we're continuing to grow our penetration testing team and are looking for a talented Security Consultant to join us. Whether you're already a CHECK Team Member (CTM) or you're an experienced penetration tester ready to take that next step ...

Penetration Tester

Location
Warmley, England, United Kingdom
Security Consultant (Penetration Testing) Location: Hybrid (UK) Salary: Competitive + Benefits Security Clearance: Current SC preferred About Citation Cyber Citation Cyber is one of the UK's leading cyber security consultancies, delivering penetration testing, Cyber Essentials certification, consultancy, training and managed cyber security services to organisations … NCSC CHECK provider and CREST member company , we're continuing to grow our penetration testing team and are looking for a talented Security Consultant to join us. Whether you're already a CHECK Team Member (CTM) or you're an experienced penetration tester ready to take that next step ...

Penetration Tester

Location
Aberdeen City, Scotland, United Kingdom
Security Consultant (Penetration Testing) Location: Hybrid (UK) Salary: Competitive + Benefits Security Clearance: Current SC preferred About Citation Cyber Citation Cyber is one of the UK's leading cyber security consultancies, delivering penetration testing, Cyber Essentials certification, consultancy, training and managed cyber security services to organisations … NCSC CHECK provider and CREST member company , we're continuing to grow our penetration testing team and are looking for a talented Security Consultant to join us. Whether you're already a CHECK Team Member (CTM) or you're an experienced penetration tester ready to take that next step ...

Penetration Tester

Location
South Shields, England, United Kingdom
Security Consultant (Penetration Testing) Location: Hybrid (UK) Salary: Competitive + Benefits Security Clearance: Current SC preferred About Citation Cyber Citation Cyber is one of the UK's leading cyber security consultancies, delivering penetration testing, Cyber Essentials certification, consultancy, training and managed cyber security services to organisations … NCSC CHECK provider and CREST member company , we're continuing to grow our penetration testing team and are looking for a talented Security Consultant to join us. Whether you're already a CHECK Team Member (CTM) or you're an experienced penetration tester ready to take that next step ...

Penetration Tester

Location
Belfast City District, Northern Ireland, United Kingdom
Security Consultant (Penetration Testing) Location: Hybrid (UK) Salary: Competitive + Benefits Security Clearance: Current SC preferred About Citation Cyber Citation Cyber is one of the UK's leading cyber security consultancies, delivering penetration testing, Cyber Essentials certification, consultancy, training and managed cyber security services to organisations … NCSC CHECK provider and CREST member company , we're continuing to grow our penetration testing team and are looking for a talented Security Consultant to join us. Whether you're already a CHECK Team Member (CTM) or you're an experienced penetration tester ready to take that next step ...

Red Team Engineer

Location
City Of London, England, United Kingdom
iProov provides science-based biometric solutions that enable the world’s most security-conscious organizations to streamline secure remote onboarding and authentication for digital and physical access. Our award-winning liveness technology and iSOC offer unmatched resilience against deepfakes and generative AI threats while ensuring effortless, scalable user experiences. … Trusted by leading governments and enterprises, including the U.S. Department of Homeland Security, U.K. Home Office, GovTech Singapore, ING, and UBS, iProov sets the standard in biometric identity assurance. This global trust is built not only on our technology but on the strength of the people behind it. ...

Software Engineer, AI (Level determined by experience)

Location
United Kingdom
Service platform manages customers’ attack surfaces by discovering new assets, pentesting for critical vulnerabilities and gaining visibility into the root causes of security risks. We are committed to making the world more secure by harnessing a talented, vetted community of security researchers to deliver continuous penetration testing … please visit www.synack.com. We are looking for a Senior Software Engineer (AI), where you'll design and ship AI agents that plan, reason, drive security tooling and surface exploitable vulnerabilities, running autonomously inside sandboxed environments. It's a hands‐on senior role spanning applied AI and cybersecurity. ...