26 to 50 of 60 Offensive Security Jobs in London

Senior Penetration Tester LSEG is seeking a senior penetration tester to join our internal offensive security team. This role is hands‐on and deeply technical, responsible for planning and driving penetration tests across a wide range of systems and applications. The successful candidate will be a skilled offensive security professional with a passion for uncovering vulnerabilities and improving security posture through thorough testing and teamwork. Key Responsibilities Conduct in‐depth penetration tests on applications, infrastructure, and cloud environments. Take full ownership of assigned penetration testing engagements end‐to‐end and deliver with limited oversight. Compile ...

First. Learn Fast Job Description:As a Penetration Tester within the internal cybersecurity team, you’ll play a key role in identifying and mitigating security risks across the organisation’s digital landscape. This position requires hands-on experience in offensive security and a deep understanding of network … application, and cloud-based vulnerabilities.You’ll be responsible for conducting thorough penetration tests, simulating real-world attacks, and delivering actionable insights to both security and development teams. Collaboration and continuous learning are central to the role, ensuring our defences stay ahead of emerging threats.Please note this is a hybrid ...

Learn Fast **Job D****escription****:**As a Penetration Tester within the internal cybersecurity team, you’ll play a key role in identifying and mitigating security risks across the organisation’s digital landscape. This position requires hands-on experience in offensive security and a deep understanding of network … application, and cloud-based vulnerabilities.You’ll be responsible for conducting thorough penetration tests, simulating real-world attacks, and delivering actionable insights to both security and development teams. Collaboration and continuous learning are central to the role, ensuring our defences stay ahead of emerging threats.Please note this is a hybrid ...

seeking a Penetration Tester to join a growing Offensive Security team within a specialist cyber security consultancy. This is an exciting opportunity to join at a time of significant investment and growth, helping to strengthen existing testing services while contributing to the development of new capabilities across … areas such as Red Teaming, Operational Technology (OT), Threat-Led Security Testing and emerging technologies. The successful candidate will play a key role in delivering penetration testing engagements, supporting process improvement initiatives, and helping to build a scalable and mature testing function. This position offers excellent opportunities for professional ...

Security Engineer (JavaScript/TypeScript) London/Remote to 80kDo you have expertise with web security combined with strong JavaScript/TypeScript coding skills You could be progressing your career at a global leader in Computer Vision, AI and biometric identity, whose technology protects governments, critical infrastructure … some of the world's largest enterprises against identity fraud, deepfakes and sophisticated cyber threats. As a Web Security Engineer you'll collaborate closely with the web development team to ensure security is at the centre of all web based applications. Joining a specialist security team ...

next step in your career.The roleThe Adversary Emulation (AE) team is G-Research’s internal Red Team and a core part of the wider Security Assurance function. The team provides the Board and Executive Management Team with independent insight into the security of our most important information, directly … informing security decisions at the highest levels of the business.AE operations range from a few weeks to more than a full year, with each engagement designed to emulate different internal and external threat actors and test a broad range of systems, processes and assumptions. The variety and complexity ...

Role: Cyber Security AnalystLocation: London/Manchester/BristolSalary: Competitive salary and package dependent on experienceCareer Level: SpecialistPlease Note: Any offer of employment is subject to satisfactory BPSS and SC security clearance which typically requires 5 years continuous UK address history usually including no periods of 30 consecutive … above information relates to a specific client requirementOur Cyber Practice is a fast-growing community of industry leading experts. The practice covers Assurance, Compliance, Security Operations (SecOps), Offensive Security and Security Research. It is critical that the relevance and quality of the services that we provide ...

NegotiableLondon, EnglandPermanentAbout the RoleWe are seeking a versatile and senior AI Staff Security Engineer to serve as the linchpin of our security posture. You will be responsible for moving our organization toward a highly proactive security stance by engineering automated workflows that replace manual overhead.This role will … Response (AIDR) solutions to protect proprietary models and systems from novel threats like prompt injection, data poisoning, and model inversion/extraction.Automate critical security workflows using Agentic/SIEM integration to achieve high operational velocity and enable rapid response to millisecond attack speeds generated by autonomous adversary AI.Execute regular ...

About the Role We are seeking a versatile and senior AI Staff Security Engineer to serve as the linchpin of our security posture. You will be responsible for moving our organization toward a highly proactive security stance by engineering automated workflows that replace manual overhead. This role … Response (AIDR) solutions to protect proprietary models and systems from novel threats like prompt injection, data poisoning, and model inversion/extraction. Automate critical security workflows using Agentic/SIEM integration to achieve high operational velocity and enable rapid response to millisecond attack speeds generated by autonomous adversary AI. ...

builds, enhancing our focus on safeguarding data and infrastructure in the face of evolving cyber threats.The ICS/OT Cybersecurity Engineer will support the security of a global OT environment by implementing, and validating cybersecurity controls across ICS/OT systems. The role includes performing risk and vulnerability assessments … contributing to secure architecture and strategy, and delivering hands-on implementation of OT security solutions such as segmentation, monitoring, and privileged remote access.The engineer will also support controlled security testing and purple team activities to validate controls, identify attack paths, and improve detection and response. Additional responsibilities include ...

protects governments, critical infrastructure and large enterprises from identity fraud, deepfakes and sophisticated cyber threats. Задачи Collaborate with the web development team to keep security central to web-based applications Focus on offensive web security as a bridge between Security and Engineering Perform penetration testing, reverse … engineering and vulnerability assessments Identify security risks and work with developers to build secure, resilient web applications Provide expert guidance on secure coding practices Influence architecture and design decisions Embed security throughout the software development lifecycle Write and review production code. Требования Strong experience in web application security ...

Moore Kingston Smith is seeking an experienced Cyber Security Consultant specialising in penetration testing to join our client-facing advisory team. You will join an NCSC-recognised cyber security team within our Risk Advisory practice, supporting a diverse portfolio of clients across multiple sectors.This is a hands … delivering penetration tests across web applications, APIs, and internal and external network infrastructure. You will also support Cyber Essentials Plus assessments and wider technical security reviews, including vulnerability assessments, configuration reviews against recognised benchmarks, and cloud security reviews. You will identify and safely validate security weaknesses, explain ...

seeking a Penetration Tester to join a growing Offensive Security team within a specialist cyber security consultancy. This is an exciting opportunity to join at a time of significant investment and growth, helping to strengthen existing testing services while contributing to the development of new capabilities across … areas such as Red Teaming, Operational Technology (OT), Threat-Led Security Testing and emerging technologies. The successful candidate will play a key role in delivering penetration testing engagements, supporting process improvement initiatives, and helping to build a scalable and mature testing function. This position offers excellent opportunities for professional ...

diversity and innovation, LSEG is a place where everyone can grow, develop and fulfil your potential with meaningful careers.ROLE SUMMARY:This opportunity within the Offensive Security Operations team is a crucial role for the management of vulnerability discovery, offensive testing and remediation activities across the group which … programmes in scope for the role include:Regulatory Threat Intelligence Led Pen Testing (TLTP) and Red teamingBug BountyContinuous External Attack Surface ManagementActive Directory security posture managementAny programme launched in the future aimed at driving down cyber risk at scaleThe applicant will be a domain authority on vulnerability testing, impact ...

different backgrounds and foster a work environment that encourages employees to collaborate and learn from each other, completely free of barriers.Job PurposeThe Senior Application Security Specialist is a senior technical role leading advanced application security testing, complex vulnerability analysis and threat modelling across the Application & Product Security function. You will provide technical leadership, mentor analysts and specialists, act as a security point of contact for engineering, and contribute to security strategy and standards.Scope & AutonomyLeads testing workstreams and sets the technical approach for complex assessments; acts as an escalation point for L1/ ...

Hack The Box is looking for a Senior Penetration Tester to join their offensive security team in Greater London. This role involves conducting penetration tests on applications, infrastructure, and cloud environments. Key responsibilities include documenting findings, collaborating with teams, and contributing to improvements in testing methodologies. Candidates should … have proven experience in penetration testing, proficiency with security tools, and strong reporting skills. Relevant certifications and threat modeling experience are advantageous. #J-18808-Ljbffr ...

future of global commerce. About the Role This role is an opportunity to work in an exciting, fast paced and complex industry in our Security Operations organization, and will play a vital role in the day to day management of our Bug Bounty Program. As part … reported to remediation owners in a timely manner while overseeing remediation efforts and retest. You will work closely with various lines of business and security champions across the organization to also mature the program and help secure Global Payments assets. What You’ll Own Assess and support severity assignment ...

Senior Security Researcher Salary: £90,000 - £100,000 + attractive benefits Location: UK (Remote-first/occasional London meetings) Employment: Full Time, Permanent This is an opportunity to join a high-growth, PE-backed cybersecurity software company whose technology protects organisations against sophisticated file-based and zero-day threats. … Following significant investment and continued growth, the business is expanding its technical capability and strengthening its dedicated security research function. This senior appointment will take ownership of complex, open-ended investigations and turn original research into practical defensive capability. You will explore unfamiliar technologies, analyse malicious material, build proof ...

Senior Security Researcher Salary: £90,000 - £100,000 + attractive benefits Location: UK (Remote-first/occasional London meetings) Employment: Full Time, Permanent This is an opportunity to join a high-growth, PE-backed cybersecurity software company whose technology protects organisations against sophisticated file-based and zero-day threats. … Following significant investment and continued growth, the business is expanding its technical capability and strengthening its dedicated security research function. This senior appointment will take ownership of complex, open-ended investigations and turn original research into practical defensive capability. You will explore unfamiliar technologies, analyse malicious material, build proof ...

approach, 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 … value diverse experiences and perspectives. Here’s what we’re looking for in our ideal candidate: 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 end-to-end in a professional service ...

defining, developing, and leading the strategic direction for safeguarding the organisation’s infrastructure and applications. This is achieved by proactively identifying, assessing, and remediating security vulnerabilities. The role sits within the Digital Engineering Services & Solutions (DES) department of the Technology Division.The role is part of the Digital Engineering Services … ensure compliance with internal controls and regulatory standards. It plays a critical role in governance, audit readiness, and the continuous improvement of MUFG’s security posture, while also serving as the central coordination point for all vulnerability-related activities across DES.The successful candidate must demonstrate proven experience in leading ...

Threat Hunter to join our global efforts in identifying and mitigating sophisticated threats targeting our clients and digital assets.As part of our Global Cyber Security group, you’ll partner with a team of security experts, researchers, and innovators to disrupt digital crime using next-generation detection capabilities … frontier models to investigate and mitigate the latest threats (e.g., phishing, smishing, malware) and operationalise hunting scenarios for real-time detection and prevention.Web Application Security Hunting: Leverage web application security expertise to analyse live traffic for vulnerabilities and attack vectors.Methodology Enhancement: Collaborate with global teams to refine Digital ...

bookings and automated marketing through mobile apps and advanced integrations with major tech brands including Instagram, Facebook and Google.About the roleReports to: VP of Security, IT and ComplianceWe're looking for someone to own security end-to-end at Fresha. You'll shape the security strategy alongside … build and run the controls that protect the business, and be the person everyone — engineers, execs, auditors, customers — looks to regarding security questions.You'll work alongside the Head of Compliance (who sits under the same VP) as a peer. They own the frameworks, the audits, and the evidence. ...

Matchtech is seeking a senior AI Staff Security Engineer to act as the linchpin of our security posture, engineering automated workflows and reducing manual overhead across the enterprise. You will manage systemic risk of Shadow AI agentic frameworks and enforce least privilege through programmatic control of software across … organization. You will design and operate AI Detection and Response (AIDR) solutions, automate critical security workflows, and lead offensive security operations #J-18808-Ljbffr ...

global financial services organisation seeks a Principal Cybersecurity Engineer to help build the next generation of data-driven security capabilities at exceptional scale.This is a senior (Director grade) individual contributor position. The role requires a candidate with deep cyber expertise and elite hands-on software engineering ability, who still … wants to spend around 40-50% of their time coding.You will work on complex security challenges across threat detection, anomaly identification, cyber automation and advanced analytics, turning vast volumes of security telemetry into practical protection.The ideal candidate may come from a security product vendor, cyber start ...