14 of 14 Penetration Tester Jobs in Central London

A premier UK consultancy is seeking a skilled and passionate Penetration Tester to join its growing team of cybersecurity experts. This is a dynamic opportunity for individuals with strong technical skills and a proactive mindset, eager to make a tangible impact across a wide range of client environments. Working on mission critical projects across National Security, Critical National … Infrastructure and Defence the Senior Penetration Tester will liaise with highly-skilled teams acting as a trusted advisor. Key Responsibilities: Conduct hands-on internal penetration tests in infrastructure/Active Directory environments Produce clear and concise technical reports, summarising findings for both technical and business stakeholders Work directly with clients as a trusted advisor – this is a … also be available: Possesses industry-recognised certifications such as CTM, CSTM, CTL, CSTL, OSCP, or CREST/Cyber Scheme qualifications. Brings specialist knowledge in one or more areas of penetration testing – this could include mobile app security, cloud environments, operational technology (OT), or specific sectors such as telecommunications, defence, or maritime. Demonstrates a strong desire to contribute to the More ❯

A premier UK consultancy is seeking a skilled and passionate Penetration Tester to join its growing team of cybersecurity experts. This is a dynamic opportunity for individuals with strong technical skills and a proactive mindset, eager to make a tangible impact across a wide range of client environments. Working on mission critical projects across National Security, Critical National … Infrastructure and Defence the Senior Penetration Tester will liaise with highly-skilled teams acting as a trusted advisor. Key Responsibilities: Conduct hands-on internal penetration tests in infrastructure/Active Directory environments Produce clear and concise technical reports, summarising findings for both technical and business stakeholders Work directly with clients as a trusted advisor – this is a … also be available: Possesses industry-recognised certifications such as CTM, CSTM, CTL, CSTL, OSCP, or CREST/Cyber Scheme qualifications. Brings specialist knowledge in one or more areas of penetration testing – this could include mobile app security, cloud environments, operational technology (OT), or specific sectors such as telecommunications, defence, or maritime. Demonstrates a strong desire to contribute to the More ❯

Penetration Tester – Infrastructure Salary: £70,000–£100,000 (depending on experience) Location: Hybrid – London (2 days per week on-site) Note: To be eligible for this role, you must be eligible for UK Security Clearance (SC). A high-performing digital security team is looking for an experienced Infrastructure Penetration Tester to join them in delivering … is suited to testers who thrive in technically demanding scenarios, want autonomy, and are motivated by work with real-world impact. Key Responsibilities Conduct internal infrastructure and Active Directory penetration tests in live production environments Produce clear, concise reports tailored to both technical and non-technical audiences Build trusted relationships with clients in a consultancy-facing capacity Work within … the evolution of internal tooling and testing methodologies Operate effectively in environments with limited documentation or predefined processes Essential Experience and Skills At least 4 years’ experience in infrastructure penetration testing Strong knowledge of Active Directory exploitation techniques (privilege escalation, lateral movement, etc.) Confident working in high-stakes, sensitive environments Strong command-line skills across Windows and Linux systems More ❯

Penetration Tester – Infrastructure Salary: £70,000–£100,000 (depending on experience) Location: Hybrid – London (2 days per week on-site) Note: To be eligible for this role, you must be eligible for UK Security Clearance (SC). A high-performing digital security team is looking for an experienced Infrastructure Penetration Tester to join them in delivering … is suited to testers who thrive in technically demanding scenarios, want autonomy, and are motivated by work with real-world impact. Key Responsibilities Conduct internal infrastructure and Active Directory penetration tests in live production environments Produce clear, concise reports tailored to both technical and non-technical audiences Build trusted relationships with clients in a consultancy-facing capacity Work within … the evolution of internal tooling and testing methodologies Operate effectively in environments with limited documentation or predefined processes Essential Experience and Skills At least 4 years’ experience in infrastructure penetration testing Strong knowledge of Active Directory exploitation techniques (privilege escalation, lateral movement, etc.) Confident working in high-stakes, sensitive environments Strong command-line skills across Windows and Linux systems More ❯

of passionate problem-solvers who are hungry to learn, grow, and make a difference. Position Summary Join a collaborative and dynamic team of cybersecurity professionals to conduct cutting-edge penetration testing across a wide range of technologies and environments. As a Consultant, you'll play a key role in identifying vulnerabilities, simulating real-world cyberattacks, and helping our clients … strengthen their security posture. Your day-to-day will include internal and external network penetration testing, application security assessments (browser-based, API, mobile), cloud environment testing, social engineering engagements, and wireless assessments. What You'll Do Perform security assessments across various platforms and technologies Simulate sophisticated cyberattacks to assess and improve client defenses Advise clients on technical security and … other consultants to deliver exceptional client service Create and maintain testing methodologies, documentation, and processes Write detailed, high-quality reports for both technical and executive stakeholders Scope and lead penetration testing engagements from start to finish Help resolve escalations during active assessments Mentor junior team members and contribute to a positive team environment Support the team's success by More ❯

Penetration Tester – Infrastructure Focus 📍 Location: London preferred (Hybrid) 💸 Salary: £70,000 – £105,000 (London) 🧠 Level: Senior Consultant to Principal Consultant (SC–PC) ⏱ Flexible hybrid model | High-trust culture | Mission-critical work 🧭 The Opportunity Join a high-impact consultancy at the forefront of innovation and digital transformation. You’ll be part of a specialist team delivering critical infrastructure penetration … in the UK — from defence and national security to critical infrastructure and operational technology. This is not a web application role . We’re looking for an infrastructure-focused penetration tester with the technical confidence and consultancy mindset to work independently, lead engagements, and deliver real-world impact. If you want to push beyond checklists and automated scans … methodologies, and continuous improvement of team capability Engage with a technical and non-technical audience, acting as a trusted security advisor 🧠 What You Bring Core Skills: 4+ years of penetration testing experience (infrastructure/internal focus) Strong hands-on expertise with Active Directory attacks, lateral movement, and privilege escalation Experience navigating live and legacy production systems Comfortable in Windows More ❯

Senior Penetration Tester -240,000+ Total Package Entasis Partners are proud to be exclusively supporting a global organisation at the forefront of innovation in financial systems and high-performance computing. This is not your average security role. Our partner operates in a deeply technical, high-trust environment where the scale of data, the pace of experimentation, and the … of internal talent make for an exceptionally challenging and rewarding opportunity. With a newly developed central London site focused on next-generation research, this firm is seeking a Senior Penetration Tester to strengthen its already world-class internal security capability. The Opportunity This is a hands-on, highly autonomous role embedded within a specialist cyber function. You’ll … be trusted to scope, execute, and deliver sophisticated penetration tests and control assessments across a range of technologies including Kubernetes, Jenkins, and Windows-based infrastructure. More than just finding issues, you’ll work in partnership with teams across the business to advise, remediate, and embed meaningful improvements. The environment is agile, collaborative, and engineered for depth not red tape. More ❯

Senior Penetration Tester -240,000+ Total Package Entasis Partners are proud to be exclusively supporting a global organisation at the forefront of innovation in financial systems and high-performance computing. This is not your average security role. Our partner operates in a deeply technical, high-trust environment where the scale of data, the pace of experimentation, and the … of internal talent make for an exceptionally challenging and rewarding opportunity. With a newly developed central London site focused on next-generation research, this firm is seeking a Senior Penetration Tester to strengthen its already world-class internal security capability. The Opportunity This is a hands-on, highly autonomous role embedded within a specialist cyber function. You’ll … be trusted to scope, execute, and deliver sophisticated penetration tests and control assessments across a range of technologies including Kubernetes, Jenkins, and Windows-based infrastructure. More than just finding issues, you’ll work in partnership with teams across the business to advise, remediate, and embed meaningful improvements. The environment is agile, collaborative, and engineered for depth not red tape. More ❯

Penetration Tester - Infrastructure/OT (Consultancy | Mostly Remote | Not for Beginners) Right. Let’s skip the fluff. One of our consultancy clients needs an experienced Infrastructure Pen Tester. Not someone who wants to be a Pen Tester. Not someone halfway through their OSCP. Someone who's been there, and got some of the battle scars already. They work More ❯

Penetration Tester - Infrastructure/OT (Consultancy | Mostly Remote | Not for Beginners) Right. Let’s skip the fluff. One of our consultancy clients needs an experienced Infrastructure Pen Tester. Not someone who wants to be a Pen Tester. Not someone halfway through their OSCP. Someone who's been there, and got some of the battle scars already. They work More ❯

Penetration Tester - £550 - £600 Per Day – London (Hybrid) – 6 Months - Financial Services Overview: A market leading organization operating within the Financial Services sector is searching for an experienced Penetration Tester to join one of their growing teams in London on a hybrid basis. Role & Responsibilities: Support technical assessments and audits to ensure IT systems and processes … UDP, IPSEC, HTTP, etc.) Technical expertise in security engineering, system and network security, authentication and security protocols Highest level of technical expertise in cybersecurity, including deep familiarity with relevant penetration and intrusion techniques and attack vectors Familiarity with the Open Web Application Security Project (OWASP) top 10 vulnerabilities Rate & Duration: £550 - £600 per day 6 Months Penetration Tester More ❯

Penetration Tester - £550 - £600 Per Day – London (Hybrid) – 6 Months - Financial Services Overview: A market leading organization operating within the Financial Services sector is searching for an experienced Penetration Tester to join one of their growing teams in London on a hybrid basis. Role & Responsibilities: Support technical assessments and audits to ensure IT systems and processes … UDP, IPSEC, HTTP, etc.) Technical expertise in security engineering, system and network security, authentication and security protocols Highest level of technical expertise in cybersecurity, including deep familiarity with relevant penetration and intrusion techniques and attack vectors Familiarity with the Open Web Application Security Project (OWASP) top 10 vulnerabilities Rate & Duration: £550 - £600 per day 6 Months Penetration Tester More ❯

CHECK Certified/Penetration Tester/Outside IR35/550 pd/6 Month/Remote I'm looking to speak to highly skilled Pentesters, with recent hands on experience and well-versed in Consultancy environments that hold CHECK certification . Recent hands-on experience and C-Suite stakeholder management will be paramount in this role. The consultancy … to remediate discovered vulnerabilities. Develop detailed reports with findings and recommendations. C-Suite stakeholder management across the client and consultancy. Non-negotiable experience required: 4+ years experience in a Penetration testing role. CHECK Certification . Proven track record of working closely with and reporting to executive level stakeholders . The role is open for applications from 05/… or get in contact with me directly (Ben Sheppard) if this role is a good fit, email an updated copy of your CV to ben.sheppard@sr2rec.co.uk CHECK Certified/Penetration Tester/Outside IR35/550 pd/6 Month/Remote More ❯

CHECK Certified/Penetration Tester/Outside IR35/550 pd/6 Month/Remote I'm looking to speak to highly skilled Pentesters, with recent hands on experience and well-versed in Consultancy environments that hold CHECK certification . Recent hands-on experience and C-Suite stakeholder management will be paramount in this role. The consultancy … to remediate discovered vulnerabilities. Develop detailed reports with findings and recommendations. C-Suite stakeholder management across the client and consultancy. Non-negotiable experience required: 4+ years experience in a Penetration testing role. CHECK Certification . Proven track record of working closely with and reporting to executive level stakeholders . The role is open for applications from 05/… or get in contact with me directly (Ben Sheppard) if this role is a good fit, email an updated copy of your CV to ben.sheppard@sr2rec.co.uk CHECK Certified/Penetration Tester/Outside IR35/550 pd/6 Month/Remote More ❯