17 of 17 Senior Tester Jobs in London

s leading Technology Solutions providers who have specialised in delivering innovative IT services to both public and private sector clients for nearly 40 years! Are you a passionate Penetration Tester with a knack for problem-solving, a curiosity for uncovering vulnerabilities, and a desire to make a real impact? We’re on the lookout for an experienced Senior … standards. Mentor junior consultants and share technical knowledge across the team. Act as a trusted technical advisor to clients. What You’ll Bring Experience: 5+ years in penetration testing. Senior-level certifications (e.g. CREST Certified Tester or Cyber Scheme Team Leader). Strong client-facing experience. Able to obtain UK security clearance. Skills & Knowledge: Skilled in tools like … conducting ITHCs (PCI DSS, PSN). Able to communicate technical detail clearly to all levels. Core competencies Passionate about cyber security and the entire security lifecycle. Comfortable engaging with senior stakeholders of all technical backgrounds. Confident, curious, and solutions-focused, and able to adapt to fast-moving environments. Excellent communicator who can make complex technical topics accessible to any More ❯

Senior Penetration Tester | 12 Month Initial Contract | £750 - £850 per day (Inside IR35) | Cheltenham or London | 1 day per week on-site | SC Clearance Eligibility Required MERITUS Talent are working with a boutique Defence consultancy supporting a UK Central Government department in their Cyber Security function. We're looking for an experienced Senior Penetration Tester with More ❯

Senior Penetration Tester | 12 Month Initial Contract | £750 - £850 per day (Inside IR35) | Cheltenham or London | 1 day per week on-site | SC Clearance Eligibility Required MERITUS Talent are working with a boutique Defence consultancy supporting a UK Central Government department in their Cyber Security function. We're looking for an experienced Senior Penetration Tester with More ❯

You will need to login before you can apply for a job. Employer: CGI Location: United Kingdom Salary: Competitive Closing date: 25 Jun 2025 Sector: IT Job Role: Penetration Tester Job Type: Permanent About CGI Cyber Security Team Our UK Cyber Security Team is one of the largest cybersecurity consultancies in the UK, with around 300 members. We work … years. Experience with bespoke applications, cloud technologies, and mobile applications across diverse platforms would be advantageous. You will have the opportunity to progress to team leader or principal tester roles and work flexibly, including at home and onsite across the UK. Qualifications We are interested in candidates holding any of the following qualifications: CHECK Team Leader (CTL) CHECK Team … Member (CTM) CREST Certified Simulated Attack Specialist (CCSAS) CREST Certified Tester (CCT), including CCT Inf and CCT App Cyber Scheme Team Leader (CSTL) TigerScheme Qualified Security Team Leader (QSTL) Crest Registered Tester (CRT) Cyber Scheme Team Member (CSTM) TigerScheme Qualified Security Team Member (QSTM) CREST Practitioner Security Analyst (CPSA) Offensive Security Certified Professional (OSCP) Join us to turn More ❯

CHECK Senior Infrastructure Penetration Tester PGI is a global consultancy that helps organisations build digital resilience. We deploy our people to implement solutions on behalf of clients or to support them in developing their capabilities. Our Penetration Testers work with organisations of all sizes and types to detect and remediate vulnerabilities. They help identify areas lacking sufficient protection. More ❯

Do you want to tackle the biggest questions in finance with near infinite compute power at your fingertips? G-Research is a leading quantitative research and technology firm, with offices in London and Dallas. We are proud to employ some More ❯

actual pay will be based on your skills and experience — talk with your recruiter to learn more. Base pay range Direct message the job poster from Opus Recruitment Solutions Senior Consultant - Cyber Security - Opus Recruitment Solutions Opus are looking for an experienced Penetration Tester to join our client, a cyber consultancy specialising exclusively in penetration testing and red … teaming, delivering high-impact, adversary-simulated engagements for clients ranging from agile tech scale-ups to critical infrastructure providers. As a Senior Penetration Tester, you’ll play a central role in executing and shaping these engagements—across infrastructure, web, cloud, and bespoke environments—while also leading goal-based assessments and full-scale red team operations. This is a … and NIST Experience with C2 frameworks (e.g., Cobalt Strike, PoshC2, Sliver) Certifications such as OSCP, CRTO, OSEP, or CREST CRT preferred (but not required) Seniority level Seniority level Mid-Senior level Employment type Employment type Full-time Job function Industries Technology, Information and Media Referrals increase your chances of interviewing at Opus Recruitment Solutions by 2x Get notified about 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 … calibre 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 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 … calibre 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 More ❯

Social network you want to login/join with: Opus are looking for an experienced Penetration Tester to join our client, a cyber consultancy specialising exclusively in penetration testing and red teaming, delivering high-impact, adversary-simulated engagements for clients ranging from agile tech scale-ups to critical infrastructure providers. As a Senior Penetration Tester, you’ll More ❯

Senior Cybersecurity Consultant (Penetration Tester) Senior Cybersecurity Consultant (Penetration Tester) Direct message the job poster from Anson McCade Senior Technology Recruitment Consultant 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 … 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 … excellent analytical skills and a curiosity-driven mindset. Enjoys working collaboratively with diverse stakeholders, bringing adaptability and energy to a fast-paced consulting environment. Seniority level Seniority level Mid-Senior level Employment type Employment type Full-time Job function Job function Information Technology and Consulting Industries IT Services and IT Consulting and Business Consulting and Services Referrals increase your More ❯

Join to apply for the Senior Penetration Tester role at Trustmarque 1 day ago Be among the first 25 applicants Join to apply for the Senior Penetration Tester role at Trustmarque Are you a passionate and highly skilled security expert, eager to lead complex penetration testing engagements and drive strategic client security? Join Trustmarque's dynamic … penetration testing team and become a pivotal force safeguarding our clients' digital ecosystems. In this senior role, you'll leverage your advanced expertise to conduct comprehensive penetration tests, provide strategic client advisory, and actively mentor the next generation of security talent. What you’ll be doing: Sharpen Your Skills, Sharpen Our Security: Stay at the forefront of the industry … at Cyber. Collaborative Spirit: Foster a culture of knowledge sharing within the Security Testing Practice team. You'll also: Be passionate about the security lifecycle. Ability to engage with senior executives of differing technical levels, and to encourage the buy in of our security ethos. Confidence, flexibility and ability to think creatively and offer solutions to complex problems. Ability More ❯

Social network you want to login/join with: Senior Penetration Tester, south west london col-narrow-left Client: Opus Recruitment Solutions Location: south west london, United Kingdom Job Category: Other - EU work permit required: Yes col-narrow-right Job Views: 2 Posted: 24.06.2025 Expiry Date: 08.08.2025 col-wide Job Description: Opus is seeking an experienced Penetration Tester More ❯

Senior Penetration Tester Are you a passionate and highly skilled security expert, eager to lead complex penetration testing engagements and drive strategic client security? Join Trustmarque's dynamic penetration testing team and become a pivotal forcesafeguarding our clients' digital ecosystems. In this senior role, you'll leverage your advanced expertise to conduct comprehensive penetration tests, provide strategic … at Cyber. Collaborative Spirit: Foster a culture of knowledge sharing within the Security Testing Practice team. You'll also: Be passionate about the security lifecycle. Ability to engage with senior executives of differing technical levels, and to encourage the buy in of our security ethos. Confidence, flexibility and ability to think creatively and offer solutions to complex problems. Ability … to translate specialist, technical information for all audiences. Here's what we're looking for: Proven track record of delivering penetration testing services. Current senior penetration testing qualification, such as Crest Certified Tester or Cyber Scheme Team Leader 3+ years of penetration testing experience Ability to maintain UK security clearances as required by the business. Proficient in at 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 consulting-facing 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 consulting-facing More ❯

Senior Penetration Tester (Inside IR35) Are you an SC cleared Penetration Tester looking for a new long term contract role? We are working with a government client looking for a Senior Penetration Tester to act as a benchmark on the quality of the penetration testing team. This role is based 4 days a week working … reports to ensure ongoing technical capability for the organisation Coaching team leaders to provide ongoing technical and leadership support Provide technical advice to project teams If you are a senior SC cleared Penetration Tester looking for a new role, please apply now! Carbon60, Lorien & SRG - The Impellam Group STEM Portfolio are acting as an Employment Business in relation More ❯