26 to 50 of 50 Penetration Tester Jobs in the UK

At Instil we specialise in providing human-focused security and penetration testing services for web applications, cloud infrastructure and mobile applications. The Role We are looking for a Penetration Tester to join our dynamic team based in Belfast. As a Pen Tester, you will be part of the delivery team, conducting penetration tests and vulnerability … Holiday Life Assurance Cycle to Work Scheme Day to Day Probe & exploit security vulnerabilities in client's Infrastructure/cloud, Web Applications and Mobile Applications using a variety of penetration tests. Write detailed reports outlining vulnerabilities and providing actionable recommendations. Collaborate with clients during kick-off and discovery sessions, providing expert advice. Stay current with the latest security threats … and trends. Research offensive security techniques to assess and validate infrastructure and technologies, including cloud-based systems. Automate repetitive tasks by developing scripts to streamline testing processes. Mentor junior penetration testers and contribute to their professional development. Play a key role in enhancing existing tools, methodologies, and reports. Occasionally support pre-sales efforts by acting as a penetration More ❯

Role: Penetration Tester Type: Permanent Location: Cheltenham/Remote Clearance: SC/DV Are you an offensive security specialist who is excited about delivering the best service possible? Keen to work in a business where you stand to work alongside some very talented testers? CND are working with a boutique Cyber Security consultancy who are focused on the … Penetration Testing market. What makes them stand out? They are not interested in flashy marketing and would never be caught trying to pass off a Nessus scan as a Penetration Test. The business has been built on delivering excellent testing and reports as well as ensuring that clients see the real benefits of their testing outputs. The company … have an office in Cheltenham however you are welcome to work where is best for you. Key Responsibilities: • Work to deliver CHECK penetration testing services • Lean into non-CHECK work where necessary • Work with the sales team to flesh out technical input as needed • Deliver quality reports to customers, • Stay up to date with industry trends and new attack 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 … could exploit, and makes recommendations to safeguard assets. What you'll be doing: Providing professional cybersecurity consultancy to internal and external stakeholders. Leading the delivery of PGI's infrastructure penetration testing. Collaborating on the design and delivery of new and existing service lines related to offensive security assessments. Supporting and often leading technical pre-sales, proposal writing, and client … ensure successful outcomes. Mentoring security consultants or clients by sharing knowledge and overseeing skill development. Participating in exercises such as Capture The Flag (CTF) challenges. Providing accurate scoping of penetration testing opportunities for sales activities. Supporting sales activities with proposals and client presentations. Supporting marketing with subject matter expertise and content development. Developing and maintaining technical skills and certifications More ❯

Why join Dionach by Nomios? Since being acquired by Nomios in late 2024, Dionach by Nomios has continued its dynamic growth as a leading information security company. Specializing in penetration testing and information assurance services, we offer an incredible opportunity to be part of an experienced team, build your skills, and grow professionally. Dionach by Nomios holds impressive certifications … environment for all our employees. If you require accommodations during the application process, let us know, and we'll work to meet your needs. What You'll Do Lead penetration testing teams to conduct penetration tests across various environments, including web applications, APIs, Cloud, and network infrastructure. Lead on-site customer engagements. Lead on developing and providing training … equivalent level. Experience : At least 5 years leading network, web, and internal penetrations tests as well as experience in leading customer engagements onsite. Leadership : Experience of supervising and mentoring penetration test teams. Training Experience : Ownership and leadership on developing and providing training courses. Tools : Proficiency with tools like Burpsuite Pro, Nessus, and other industry standards. Communication : Strong verbal and More ❯

our clients, including Risk Assessments, Vulnerability Management, Accreditations (ISO27001, GDPR), GRC (Governance, Risk, Compliance), Security Architecture Design and Build (both technical and non-technical), Incident Response, Protective Monitoring Services, Penetration Testing, and more. Our approach involves guiding clients to improve their security posture and maturity, ensuring confidence in their security controls, measures, and systems aligned with their requirements. At … evolving landscape, aligning with your career ambitions and supporting your professional growth. Roles are contingent upon holding or obtaining a UK Security Clearance. Future duties and responsibilities: An experienced penetration tester role has become available due to growth, joining CGI's Cyber Security team, one of the UK's largest groups of cyber security specialists. CGI has over … diverse range of commercial and public sector clients. Experience with bespoke applications, cloud technologies, and mobile applications across various platforms is advantageous. You will join our established team of penetration testers, with opportunities for progression to team leader or principal tester roles. The role offers flexible working arrangements, including remote work and on-site client visits across the More ❯

A UK-based cyber security consultancy is seeking a CHECK Team Member or Team Leader certified Penetration Tester to join their growing offensive security team. This is an opportunity to work on high-assurance engagements across public and private sector clients, delivering technical assessments to support risk reduction, compliance, and threat readiness. Key Responsibilities Deliver infrastructure and application … penetration tests in line with CHECK/NCSC requirements Produce high-quality technical and non-technical reports with clear risk articulation Lead or contribute to Red Team, scenario-based and assurance testing engagements Liaise with clients pre- and post-engagement to scope, explain findings, and advise on remediation Maintain technical expertise in emerging tools, attack vectors, and testing methodologies … Support internal knowledge sharing and mentoring of junior team members Essential Requirements Current CHECK Team Member (CTM) or CHECK Team Leader (CTL) status Demonstrable experience delivering penetration testing across networks, applications, and cloud environments Strong working knowledge of tools such as Burp Suite, Cobalt Strike, Kali Linux, etc. Familiarity with reporting to NCSC standards and presenting findings to both More ❯

ReRoot Cyber is seeking highly skilled and forward-thinking penetration testers to join one of the UK’s most respected testing teams for their Scotland division. This is an independent, privately owned testing consultancy led by industry-recognised names who are hackers at heart. This team is led by an active penetration tester who understands the niggles … of day penetration testing operations. As a result, engagements are centred around making your day-to-day responsibilities as easy as possible, with a pure focus on value added testing. They have no problem with 2+1’s and pub sec engagements... but that’s not where they phish. Most of your time will be spent on advanced testing and … wider technologists. (engineers, developers and blue teamers) If you thrive on bringing ideas to life, creating bespoke tools and adding true value to your clients, then this is the penetration testing team for you. This is a home based position with very very very limited travel & public sector work. Full right to work in the UK is required Ideally More ❯

What You'll Be Working On: ️ Performing comprehensive penetration testing on web applications, networks, and infrastructure ️ Identifying vulnerabilities and providing detailed reports with recommendations for remediation ️ Conducting vulnerability assessments and risk analyses to identify areas of concern ️ Collaborating with development and IT teams to improve overall security posture ️ Keeping up to date with the latest security threats, techniques, and … tools to ensure effective testing What We're Looking For: ️ Proven experience as a Penetration Tester or in a similar role within cybersecurity ️ Strong knowledge of common vulnerabilities (OWASP Top 10, CVEs) and attack techniques ️ Familiarity with penetration testing tools such as Burp Suite, Metasploit, Nessus, and Nmap ️ Certifications such as OSCP, CEH, or equivalent are highly More ❯

has grown to employ elite technical experts who have contributed to some of the world's largest technology and digital security projects. The NCSC-approved CHECK company specializes in penetration testing and security assessment services under the government-accredited CHECK scheme. They are currently seeking for a skilled Penetration Tester to join the growing team. This role … standard and in-house developed tools for security testing. Conduct manual reviews to identify issues within customer infrastructure and web applications. Perform various types of security testing, including network penetration, web application, mobile security assessments, and social engineering. Participate in red team engagements, employing creative strategies to outsmart defenders. Explore various approaches to gain unauthorized access to customer networks … solving capabilities. Possesses a solid understanding and fascination with fundamental concepts in operating systems and networking. Displays a keen interest in security principles and protocols. Demonstrates proven experience in penetration testing and/or security surveillance. Exhibits eagerness to absorb new knowledge and technologies. Programming Exposure A relevant Cyber Security certification is advantageous, e.g. (OSCP, CRT, CTM, CTL) Showcases More ❯

the most trusted technology solutions partner; renowned for being the best and brightest, having lasting impact with our customers and delivering exceptional returns to our stakeholders. Position Summary The penetration testing team at Claranet Cyber Security is composed of highly skilled, professional ethical hackers with a real passion for improving our clients’ security posture by demonstrating how systems can … be compromised and what steps can be taken to defend. Team members work on everything from client projects to development work and training, dealing with large corporate penetration tests to gaining credit for published advisories. Role Mission Claranet’s strategy is to build long-term, trusted relationships with its customers by delivering market-leading, integrated managed services. We are … seeking highly driven and aspirant penetration testing consultants to conduct a broad range of specialist engagements. Duties and Responsibilities Essential Roles & Responsibilities As an Associate Penetration Tester at Claranet, you will able to deliver you own web application tests and through training and partnering, you will have the opportunity to become involved in a full range of More ❯

Are you ready to take the lead in offensive security? Join a multi award winning cybersecurity provider recognised for delivering world class managed security services, CREST accredited penetration testing, and cutting edge cyber defence strategies. With a proven track record of helping organisations strengthen their security posture and stay ahead of evolving threats, the team has become a trusted … partner for enterprises across highly regulated industries, including finance, government, and critical infrastructure. The team is seeking a Lead Penetration Tester to own and elevate its offensive security program. In this fully remote, outside IR35 contract role, the position involves defining and executing end to end infrastructure and web app testing strategies, mentoring a team of testers, collaborating … refining methodologies to counter emerging threats. Looking for a role where leadership meets technical depth? Apply now! Responsibilities: Define & Lead Testing Strategy - Architect, plan and oversee end-to-end penetration tests for infrastructure and web applications, ensuring coverage of critical assets and compliance requirements Advanced Assessment & Analysis - Personally conduct deep-dive tests on high-risk systems, interpret results, and More ❯

Why join Dionach by Nomios? Since being acquired by Nomios in late 2024, Dionach by Nomios has continued its dynamic growth as a leading information security company. Specializing in penetration testing and information assurance services, we offer an incredible opportunity to be part of an experienced team, build your skills, and grow professionally. Dionach by Nomios holds impressive certifications … If you require accommodations during the application process, let us know, and we'll work to meet your needs. What You'll Do Lead and mentor a team of Penetration testers, fostering a collaborative and high-performance work environment. Lead and oversee complex infrastructure penetration tests ensuring that they are conducted thoroughly and in accordance with project requirement. … and mobile application tests, internal tests, infrastructure tests, but also, social engineering. Ensure all testing activities comply with CHECK standards. What We're Looking For Experience : Significant experience in penetration testing, including network, web application and internal penetration testing as well as experience of leading customer engagements on-site. Communication : Strong verbal and written skills for stakeholder management More ❯

Title: Senior Penetration Testing Consultant Salary: Up to £50,000 Hybrid working (1 day per quarter in the office) Summary: A Senior Penetration Testing Consultant is responsible for leading and conducting advanced penetration tests across networks, applications, and infrastructure. This remote-first role involves defining scopes with clients, executing technical assessments, and delivering detailed reports with remediation … guidance. The position requires strong technical leadership, mentoring junior testers, and staying ahead of emerging cyber threats through research and innovation. Key Responsibilities: Perform advanced penetration tests and vulnerability assessments. Engage with clients to define testing objectives and provide expert consultancy. Lead junior testers, review reports, and ensure technical accuracy. Deliver clear, comprehensive documentation and present findings to clients. … to new tools, methodologies, and red team capabilities. Collaborate across security teams and maintain strong client relationships. Support project delivery and manage multiple testing engagements. Requirements: Extensive experience in penetration testing and ethical hacking. Certifications such as OSCP, CRT, CSTM, or equivalent. Must hold Check Team Member (CTM) status Proficiency with offensive security tools and techniques. Strong communication, leadership More ❯

CHECK TL/TM Penetration Testers required CHECK Penetration tester/CTL & CTM/Web & Inf/Outside IR35/Fully Remote/£600 pd/ASAP Start/3 Months SR2 have partnered with an exciting, specialist Cyber Security Consultancy looking to expand their consultant CHECK team ahead of projected growth and upcoming projects. The CTL … will lead on high-assurance CHECK penetration tests and ITHC projects and occasionally assist on other commercial engagements. The CTM role will support CHECK engagements, uphold testing standards and create high quality reports.We are currently looking for:CTL dual badgeCTL Inf CTL WebCTMCTL requirements:A CTL Qualification - Inf, Web or Dual at Chartered or Principal level.Extensive background in penetration testing.Currently holding, or the ability to obtain SC clearance.Passionate and proactive in your testing approach.Excellent communication skills.CTM Requirements:Extensive background in penetration testing.Ideally holding CRT.Currently holding, or the ability to obtain SC clearance.Excellent communication and a proactive ability to collaborate.Contract Details3 Months initially - Very likely extension based on project pipelineOutside IR35£600 Per day dependant on experienceRemote, with More ❯

Are you ready to venture deeper into your career as a Senior Penetration Testing Consultant? Join a well-established Managed Security Service Provider (MSSP) and a leading Fortinet and Microsoft partner, delivering high-impact cybersecurity solutions to clients in the defense, government, and financial services industries. Committed to nurturing talent, the organization offers a certification sponsorship and professional development … plan. They are currently seeking for a Senior Penetration Testing Consultant to lead advanced penetration tests and security assessments of systems, networks, and applications. Ready to take the next step in your career? Apply today! Responsibilities: Conduct advanced penetration tests, including complex network, application security, and specialized assessments. Use cutting-edge tools and techniques to identify and … exploit vulnerabilities in diverse environments. Apply knowledge and practical experience in cloud and mobile penetration testing. Collaborate with clients to define project scopes, objectives, and expectations, including conducting pre-engagement meetings to understand their environments and threat landscapes. Offer technical leadership by guiding and mentoring junior team members while reviewing and validating their work to ensure quality and accuracy. More ❯

CHECK TL/TM Penetration Testers required CHECK Penetration tester/CTL & CTM/Web & Inf/Outside IR35/Fully Remote/£600 pd/ASAP Start/3 Months SR2 have partnered with an exciting, specialist Cyber Security Consultancy looking to expand their consultant CHECK team ahead of projected growth and upcoming projects. The CTL … will lead on high-assurance CHECK penetration tests and ITHC projects and occasionally assist on other commercial engagements. The CTM role will support CHECK engagements, uphold testing standards and create high quality reports. We are currently looking for: CTL dual badge CTL Inf CTL Web CTM CTL requirements: A CTL Qualification - Inf, Web or Dual at Chartered or Principal … level. Extensive background in penetration testing. Currently holding, or the ability to obtain SC clearance. Passionate and proactive in your testing approach. Excellent communication skills. CTM Requirements: Extensive background in penetration testing. Ideally holding CRT. Currently holding, or the ability to obtain SC clearance. Excellent communication and a proactive ability to collaborate. Contract Details 3 Months initially - Very More ❯

We are seeking a highly skilled and experienced Offensive Security Consultant with a strong focus on threat intelligence and attack methods. The ideal candidate will manage and conduct advanced penetration testing engagements, leveraging threat intelligence to simulate real-world attacks across various environments, including OT, IT, web applications, cloud infrastructure, and APIs. This role requires a deep understanding of … skills, and the ability to provide strategic, actionable recommendations to enhance our clients' security posture. What you'll be doing: Responsibilities: Lead and manage the full lifecycle of complex penetration testing engagements, applying a threat intelligence-led approach. Execute advanced penetration tests across environments such as applications, infrastructure, web, APIs, O365, Azure, AWS, and OT, using current threat … detection and response. Drive patching efforts for vulnerabilities based on threat intelligence and exploitation potential. What experience you'll bring: Skills and Qualifications: At least 5 years of professional penetration testing experience with a focus on adversarial tactics and threat intelligence. Understanding of OT and IT assets, technologies, and security best practices within the current threat landscape. Deep knowledge More ❯

connectivity across the region. If you would like to learn more about this opportunity, feel free to reach out and apply today! Responsibilities: Lead full-scope, threat intelligence-led penetration testing across applications, infrastructure, cloud (AWS, Azure), APIs, OT/ICS, and O365. Develop sophisticated test plans and use cases based on emerging threats and attacker TTPs. Produce detailed … track vulnerability remediation, contributing to blue team effectiveness. Conduct ongoing research and contribute to thought leadership in threat-informed testing methodologies. Required Skills: 5+ years of professional experience in penetration testing, with a strong emphasis on threat intel and adversary emulation. Deep understanding of OT/IT systems, common vulnerabilities, network protocols, cryptography, and attack vectors. Proficiency in tools More ❯

IEC 27001. If you would like to learn more about this opportunity, feel free to reach out and apply today! Responsibilities: Conduct web, mobile, API, infrastructure, cloud, and wireless penetration testing. Create detailed technical reports and deliver test findings directly to clients. Provide remediation advice and post-assessment consultancy. Contribute to internal testing methodologies and Red Team/social More ❯

We are looking for a Penetration Testing Consultant based in the United Kingdom to join our rapidly expanding Penetration Testing team at Rootshell Security. The role involves remote engagements and on-site client visits to conduct penetration security testing and help mitigate risks for our clients. Rootshell Security is an equal opportunity employer that values diversity regardless More ❯

help businesses and organisations safeguard their digital assets, protect their sensitive information, and maintain regulatory compliance. The Role Ideally, the candidate will have 4-5 years previous experience with penetration testing, good fundamental knowledge of networking and web applications, good time management, and an understanding of how to be business effective in providing solutions to clients. The candidate having … scripting languages Experience with vulnerabilities in web applications and API interfaces Certs such as OSCP, CSTM, CSTL, CREST-CRT, etc. Duties Independent conception, implementation and documentation/reporting of penetration tests. Consulting with clients and working as a team on a range as engagements Support of other employees in penetration tests What we offer Pension Employee Social Events More ❯

Join a dynamic cybersecurity team near Doncaster or Manchester, where you'll play a key role in securing clients' digital landscapes. As a penetration testing expert, you will work on cutting-edge projects across infrastructure, web applications, mobile, and cloud environments. Collaborating with a talented team, you'll have the opportunity to contribute to innovative cybersecurity solutions while enjoying … continued growth and development in the field. Take the next step in your cybersecurity career-apply now! Responsibilities: Conduct penetration testing on infrastructure, web applications, mobile platforms, and cloud environments to uncover vulnerabilities. Analyze testing outcomes and provide actionable recommendations to improve security measures. Collaborate with cross-functional teams to develop and implement security strategies. Stay updated on emerging … cybersecurity threats and adapt testing methodologies accordingly. Skills/Must Have: Proven experience in penetration testing for infrastructure, web applications, mobile, and cloud environments. Strong understanding of networking protocols, systems architecture, and security best practices. Proficiency in using penetration testing tools and techniques to identify vulnerabilities. Excellent problem-solving skills with a detail-oriented approach. Must be able More ❯

Are you looking for an exciting new opportunity? Join a trusted security and compliance partner offering comprehensive services including GRC consulting, CREST-accredited penetration testing, and an industry-leading vulnerability management service. As the number one Global Service Partner of Vanta, the company has a proven track record of helping hundreds of businesses from tech startups to global industry … posture and compliance needs. If you would like to learn more about this opportunity, feel free to reach out and apply today! Responsibilities: Work across the full spectrum of penetration testing and red teaming Contribute to client relationships and leading high-level engagements Scoping and delivering advanced red team assessments Mentoring more junior team members Supporting innovation through offensive … security research Required Skills/Qualifications: Minimum 7 years of penetration testing experience, with at least 4 years in red teaming Strong hands-on background across a range of testing disciplines, including networks, infrastructure, applications, and cloud Comfortable in client-facing roles with strong communication skills Deep understanding of adversary simulation, lateral movement, and offensive tooling Capable of producing More ❯

to work in a business where you stand to work alongside some very talented testers? CND are working with a boutique Cyber Security consultancy who are focused on the Penetration Testing market. What makes them stand out? They are not interested in flashy marketing and would never be caught trying to pass off a Nessus scan as a Penetration … tests. Currently holds a CHECK equivalency certification. Eligibility to hold or currently hold clearance. Experience working with Linux and Windows OS. Strong understanding of working with common tooling for penetration testing. Ideally, a knowledge of Cloud services such as Azure or AWS. Capability to script or code in Bash, Python etc. Appreciation for Cyber Security standards such as ISO27001 More ❯

Malware Analyst/Pen Tester - Android £625-£650 p/d Outside IR35 Hybrid - London 6 Months SR2 are supporting a major global tech client in the expansion of their elite malware analysis team. They're hiring two Malware Analysts with deep Android security expertise to uncover malicious behaviours, reverse engineer complex APKs, and assess real-world risks at More ❯