10 of 10 Permanent Penetration Testing Jobs in the Thames Valley

Network Security Engineer Network Security/Penetration Testing/CREST/CSTL/API Testing/Config Reviews/Infrastructure/Outside IR35/West London We’re seeking an experienced Network Security Engineer to support a major multi-phase security testing project. You’ll conduct penetration tests, configuration reviews, and infrastructure assessments, contributing to … a high-profile programme of work extending into next year. Required Strong background in network and infrastructure security. Experience performing penetration testing, configuration reviews, and API testing. Knowledge of “classic” CHECK-style testing methodologies. CREST, CSTL or CTL certification (Team Member or Team Leader level). Ability to deliver high-quality reports and communicate technical findings clearly. … Hands-on experience across infrastructure, networking, and external testing. Desirable Experience working within CHECK or other accredited testing schemes. Strong understanding of secure network architecture and hardening practices. Previous consultancy or project-based testing experience. Contract Details Outside IR35 West London (on-site presence required for majority of testing) 0-hours contract – project-based work, phase by More ❯

Penetration Tester – Cyber Security Contract until December 2025 (extension likely) Hybrid working, 50/50 split between home and site in Berkshire Active SC clearance required ABOUT THE CLIENT: Our client is a leading organisation within the cyber and defence technology sector, delivering secure digital solutions to UK government and critical national infrastructure programmes. They are expanding their cyber … capability and are seeking an experienced Penetration Tester to join the team on a long-term contract, supporting a range of high-impact security projects. THE PENETRATION TESTER ROLE: As a Penetration Tester, you will perform manual and automated testing across web applications, networks, APIs, and mobile platforms. You’ll identify and document vulnerabilities, support red … team operations, and collaborate with development and infrastructure teams to ensure effective remediation and security improvements. Key responsibilities include: Conducting penetration tests and vulnerability assessments across multiple environments Performing red team and threat simulation exercises Producing detailed reports outlining findings, risks, and mitigation strategies Staying current with emerging attack vectors, tools, and exploits Contributing to internal security awareness and More ❯

Penetration Tester – Cyber Security Contract until December 2025 (extension likely) Hybrid working, 50/50 split between home and site in Berkshire Active SC clearance required ABOUT THE CLIENT: Our client is a leading organisation within the cyber and defence technology sector, delivering secure digital solutions to UK government and critical national infrastructure programmes. They are expanding their cyber … capability and are seeking an experienced Penetration Tester to join the team on a long-term contract, supporting a range of high-impact security projects. THE PENETRATION TESTER ROLE: As a Penetration Tester, you will perform manual and automated testing across web applications, networks, APIs, and mobile platforms. You’ll identify and document vulnerabilities, support red … team operations, and collaborate with development and infrastructure teams to ensure effective remediation and security improvements. Key responsibilities include: Conducting penetration tests and vulnerability assessments across multiple environments Performing red team and threat simulation exercises Producing detailed reports outlining findings, risks, and mitigation strategies Staying current with emerging attack vectors, tools, and exploits Contributing to internal security awareness and More ❯

in London, is a global Cybersecurity advisory firm. They are hiring a Senior Pentester in London (hybrid, 2x day a week in London offices). Responsibilities: Lead and deliver penetration tests across various industries, including infrastructure, technology, healthcare, financial services, and retail. Engage directly with clients, building credibility and strong professional relationships. Oversee end-to-end testing, from … remaining undetected by XDR/IDS/IPS/EDR systems. Conduct physical security assessments, including covert access operations. Qualifications & Skills: 5 - 10 years of experience in hands-on penetration testing/red teaming/Offensive Security operations with consulting/client-facing experience. Experience as a CHECK Team Lead. Proficiency in scripting and programming languages such as More ❯

Manage security environments across Azure and AWS infrastructure. Lead incident response efforts and coordinate vulnerability remediation activities. Manage continuous security monitoring, alerting, and detection systems. Administer vulnerability management and penetration testing programs. Maintain strong identity, access, and privilege management controls. Compliance & Assurance (30%) Manage and maintain ISO 27001 certification and audit processes. Ensure ongoing compliance with PCI DSS More ❯

Engineer will have first-class scoping and planning skills. The IT Project Engineer will host security consultations and conduct vulnerability assessments. The IT Project Engineer will oversee and direct Penetration Testing exercises. The IT Project Engineer will be familiar with Cyber Essentials, Microsoft Copilot and PCI-DSS. The IT Project Engineer will be network-savvy. Think firewalls, switches More ❯

initiatives. Key Responsibilities Develop and execute an information security strategy and roadmap aligned with business goals. Lead on governance, compliance, and audit processes across the organisation. Manage incident response, penetration testing, and risk assessments. Support secure software development and supplier risk management. Promote security awareness and report regularly to senior leadership on risk posture. Skills & Experience Required Previous More ❯

tailored solutions. Maintain accurate pipeline management and revenue forecasting. Deliver against ambitious new business targets, landing deals typically in the £20k–£40k range . Cybersecurity Services You’ll Sell Penetration Testing & Red Teaming Managed Detection & Response (MDR) Security Operations Centre (SOC) services Threat Intelligence & Risk Advisory Incident Response & Crisis Management Cloud & Endpoint Security Solutions What You Bring Proven More ❯

play a key role in shaping the security posture of our organisation. About the Role As a Senior Application Security Engineer, you’ll bring deep expertise in application security testing, cloud security, and secure development practices. You’ll work closely with IT, development, and project teams to embed security into every stage of the software development lifecycle and drive … Proven experience in application security engineering. Strong knowledge of security tools and technologies (e.g. WAFs, AV, email/web gateways, ACLs). Expertise in secure coding practices and security testing (SAST, DAST, SCA, Pen Testing). Familiarity with OWASP Top 10, CWE, and remediation strategies. Hands-on experience with security testing tools and techniques. Excellent communication and More ❯

vital. You thrive on problem-solving and have a passion for technology Solid understanding of Security Networking, Microsoft Windows OS and Active Directory Any experience in SOC or pen testing is beneficial Responsibilities for Operations Engineer - CyberSecurity: Working within Service Delivery in the Operations Team you will cover 3 main areas within the business and your time will be … Manage client relationships Working on Security Roadmaps for Clients Post-sales technical support & troubleshooting of issues IT administration and sysadmin There is the opportunity to work on some pen-testing and SOC focussed projects for those with experience in these What this offers: A highly varied and exciting role where you will learn many areas in the security and More ❯