1 to 25 of 28 Penetration Tester Jobs in the South East

Join to apply for the Lead Penetration Tester role at SITA 2 days ago Be among the first 25 applicants Join to apply for the Lead Penetration Tester role at SITA Overview WELCOME TO SITA We're the team that keeps airports moving, airlines flying smoothly, and borders open. Our tech and communication innovations are the … clockwork. Want to be a part of something big? Are you ready to love your job? The adventure begins right here, with you, at SITA. PURPOSE As a Lead Penetration Tester , part of the SITA Enterprise Information Security Office, you will assess SITA infrastructure and products to identify information security weaknesses and provide remediation strategies. You will also … of the DevOps lifecycle. Provide guidance on secure product design: Threat Modelling, architecture reviews. Qualifications EXPERIENCE 5-7 years' experience in at least three of the following fields: Network penetration testing Web and mobile application assessments Cloud penetration testing (Azure, AWS,...) Mastery of Unix/Linux/Windows operating systems, including bash and PowerShell, shell scripting or More ❯

Social network you want to login/join with: Senior Cybersecurity Consultant (Penetration Tester), slough col-narrow-left Client: Anson McCade Location: slough, United Kingdom Job Category: Other - EU work permit required: Yes col-narrow-right Job Views: 7 Posted: 16.06.2025 Expiry Date: 31.07.2025 col-wide Job Description: 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 role Operate in sensitive, high-risk environments where More ❯

opportunity to join a team that values your expertise, supports your growth, and offers the flexibility of remote working with the stimulation of varied engagements. Key Responsibilities: Conduct thorough penetration tests on infrastructure, networks, cloud environments, and web applications. Deliver high-quality, client-ready reports detailing findings, impact, and practical remediation advice. Collaborate directly with client stakeholders during scoping … e.g., OWASP Top 10, MITRE ATT&CK). Strong familiarity with tools such as Burp Suite, Nmap, Metasploit, etc. Excellent communication and reporting skills. Required Qualifications: Demonstrable experience in penetration testing (minimum 2 years preferred). Hold at least one of the following certifications: OSCP (Offensive Security Certified Professional) CRT (CREST Registered Tester) CCT-INF (CREST Certified Infrastructure … Tester) #J-18808-Ljbffr More ❯

opportunity to join a team that values your expertise, supports your growth, and offers the flexibility of remote working with the stimulation of varied engagements. Key Responsibilities: Conduct thorough penetration tests on infrastructure, networks, cloud environments, and web applications. Deliver high-quality, client-ready reports detailing findings, impact, and practical remediation advice. Collaborate directly with client stakeholders during scoping … e.g., OWASP Top 10, MITRE ATT&CK). Strong familiarity with tools such as Burp Suite, Nmap, Metasploit, etc. Excellent communication and reporting skills. Required Qualifications: Demonstrable experience in penetration testing (minimum 2 years preferred). Hold at least one of the following certifications: OSCP (Offensive Security Certified Professional) CRT (CREST Registered Tester) CCT-INF (CREST Certified Infrastructure … Tester) #J-18808-Ljbffr More ❯

opportunity to join a team that values your expertise, supports your growth, and offers the flexibility of remote working with the stimulation of varied engagements. Key Responsibilities: Conduct thorough penetration tests on infrastructure, networks, cloud environments, and web applications. Deliver high-quality, client-ready reports detailing findings, impact, and practical remediation advice. Collaborate directly with client stakeholders during scoping … e.g., OWASP Top 10, MITRE ATT&CK). Strong familiarity with tools such as Burp Suite, Nmap, Metasploit, etc. Excellent communication and reporting skills. Required Qualifications: Demonstrable experience in penetration testing (minimum 2 years preferred). Hold at least one of the following certifications: OSCP (Offensive Security Certified Professional) CRT (CREST Registered Tester) CCT-INF (CREST Certified Infrastructure … Tester) #J-18808-Ljbffr More ❯

opportunity to join a team that values your expertise, supports your growth, and offers the flexibility of remote working with the stimulation of varied engagements. Key Responsibilities: Conduct thorough penetration tests on infrastructure, networks, cloud environments, and web applications. Deliver high-quality, client-ready reports detailing findings, impact, and practical remediation advice. Collaborate directly with client stakeholders during scoping … e.g., OWASP Top 10, MITRE ATT&CK). Strong familiarity with tools such as Burp Suite, Nmap, Metasploit, etc. Excellent communication and reporting skills. Required Qualifications: Demonstrable experience in penetration testing (minimum 2 years preferred). Hold at least one of the following certifications: OSCP (Offensive Security Certified Professional) CRT (CREST Registered Tester) CCT-INF (CREST Certified Infrastructure … Tester) #J-18808-Ljbffr More ❯

opportunity to join a team that values your expertise, supports your growth, and offers the flexibility of remote working with the stimulation of varied engagements. Key Responsibilities: Conduct thorough penetration tests on infrastructure, networks, cloud environments, and web applications. Deliver high-quality, client-ready reports detailing findings, impact, and practical remediation advice. Collaborate directly with client stakeholders during scoping … e.g., OWASP Top 10, MITRE ATT&CK). Strong familiarity with tools such as Burp Suite, Nmap, Metasploit, etc. Excellent communication and reporting skills. Required Qualifications: Demonstrable experience in penetration testing (minimum 2 years preferred). Hold at least one of the following certifications: OSCP (Offensive Security Certified Professional) CRT (CREST Registered Tester) CCT-INF (CREST Certified Infrastructure … Tester) #J-18808-Ljbffr More ❯

We are currently seeking a highly skilled and results-oriented Penetration Tester with at least 5 years of hands-on penetration testing experience. This is a rare opportunity to join a highly skilled and diverse security team committed to continuous growth and excellence in the field of offensive security. This role is office-based with occasional travel … to client site. Key Responsibilities Lead internal and external penetration tests, including web, mobile, infrastructure, wireless, cloud, and social engineering. Execute red team, purple team, and breach simulation exercises tailored to client maturity and objectives. Deliver detailed and actionable penetration testing reports Collaborate with clients to understand their specific security needs and present findings in a clear manner. … Develop and maintain security testing methodologies and procedures in alignment with industry best practices. Reviewed penetration test reports to ensure they are up to standard and meet test objectives. Mentor junior penetration testers. Assist in incident response activities, including investigation, containment, and remediation of security incidents. Conduct cloud security assessments. Essential Requirements Must be currently residing in mainland More ❯

Penetration Tester (OSCP Certified) - Up to £45,000 DOE Location: UK fully remote Salary: Up to £45,000 per annum, dependent on experience Employment Type: Full-Time, Permanent Eligibility: UK Residents only (UK Passport or Indefinite Leave to Remain required) - Unfortunately, PSW Visas cannot be considered. A very exciting growth role for the right person! I'm an … experinced cyber recruiter (of 20 yrs+) ready to talk to qualified individuals. We are currently seeking an enthusiastic and technically capable Penetration Tester with at least 6 months of hands-on penetration testing experience and a strong interest in developing advanced technical skills. This is a rare opportunity to join a highly skilled and diverse security team … committed to continuous growth and excellence in the field of offensive security. Key Responsibilities: Conduct hands-on Web Application Penetration Testing Support and contribute to Infrastructure and Cloud Security Assessments Be mentored and trained towards Adversarial Simulation , Red Team Operations , and other advanced offensive security techniques Write detailed, clear, and professional reports for technical and non-technical stakeholders Collaborate More ❯

Security Testing Consultant (Penetration Tester) Location: London (on-site), with optional hybrid working after probation About the Role Join a team of security experts conducting penetration testing across web, mobile, API, infrastructure, and cloud platforms. You’ll assess critical client environments, produce actionable reports, and support junior team members while contributing to Red Team exercises and internal … dynamic work environment Autonomy and opportunities for growth Annual training plan, regular reviews, and access to industry events Hybrid working after probation Responsibilities Perform black, grey, and white-box penetration tests across web, mobile, API, infrastructure, and cloud platforms (AWS, Azure, GCP) Draft clear, actionable reports and present findings to clients Assist junior team members and support Red Team …/LLM security experience Participation in bug bounty or vulnerability disclosure programmes Education & Experience Bachelor’s degree in Cybersecurity or Computer Science (preferred) 3–5 years of hands-on penetration testing experience Certifications such as CREST CRT, OSCP, OSCE, or CCT (or equivalent) highly desirable If you are interested please email your CV to megan.seymour@stottandmay.com for immediate consideration More ❯

As a Senior Security Penetration Tester , you will be responsible for supporting the design, implementation, and maintenance of TVM (Threat & Vulnerability Management) solutions, controls and processes across the organisation. You will be liaising with Digital teams to ensure appropriate mitigation and remediation of vulnerabilities detected across our IT estate. This role requires an understanding of TVM concepts, technologies … will possess strong communication skills and will be committed to ensuring the highest level of security, compliance, and user experience. What you'll be doing as a Senior Security Penetration Tester Help support and develop an internal penetration testing function. Conduct network, application penetration testing, code and security reviews. Identify and exploit vulnerabilities through proof-of … implemented and maintained. Responsible for supporting the creation of the operating model for vulnerability management, that it is shared, agreed and operates effectively across the business. Develop and maintain penetration testing documentation, policies, and procedures. Integrate cybersecurity solutions (e.g. vulnerability scanning tools) with existing systems, applications, and infrastructure. Evaluate and recommend technologies, tools, and vendors to meet business needs. 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 ❯

an enthusiastic Cyber Security Consultant to join our team. Working alongside our experienced team of specialists, you'll be delivering offensive security services including digital footprint reconnaissance, social engineering, penetration testing and vulnerability assessments to high profile clients across all industries. The purpose of this role is to deliver our offensive security services including digital footprint reconnaissance, social engineering … vulnerability assessments, penetration testing, threat modelling, cyber-attack simulation exercises, and more to high profile clients across all industries. You'll benefit from ongoing coaching, career mentoring, and be supported by our career pathway. You will have an opportunity to continue to develop market leading skills across our different capabilities and advance your professional development. You will make an … improvements, this role is perfect for you! We value diverse experiences and perspectives. Here's what we're looking for in our ideal candidate: Experience in offensive security and penetration testing. Demonstrable experience in infrastructure and web application testing; experience in API testing is desirable. Demonstrable experience using common pentesting tools including Kali Linux, Burpsuite, Nessus and other industry 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 ❯

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 ❯

Social network you want to login/join with: Penetration Tester (Junior), High Wycombe Client: Addition+ Location: High Wycombe, United Kingdom Job Category: Other - EU work permit required: Yes Job Views: 12 Posted: 04.06.2025 Expiry Date: 19.07.2025 Job Description: We are currently recruiting for a dynamic UK technology provider for the role of Penetration Tester . … due to the nature of clients. Full UK Driving License & Access to a vehicle are essential. Experience working in the public sector. Minimum of 2+ years of experience in Penetration Testing. Any of the following Penetration Testing Certifications: CompTIA, OSWE, CRTO, CPT, LPT, CEPT, CCPT, CPENT, CRPT, etc. Strong background and understanding of cybersecurity, with a knowledge of … penetration testing frameworks and methodologies. Strong client-facing skills, with the ability to present and discuss findings remotely or in person. Offensive Security Certified Professional (OSCP) certification is highly preferred. How you'll be rewarded Mentorship from Senior Leaders across the business #J-18808-Ljbffr More ❯

Social network you want to login/join with: Penetration Tester, crawley, west sussex col-narrow-left Client: Network IT Recruitment Limited Location: crawley, west sussex, United Kingdom Job Category: Other - EU work permit required: Yes col-narrow-right Job Views: 6 Posted: 31.05.2025 Expiry Date: 15.07.2025 col-wide Job Description: If you're looking to join an … established organisation expanding their penetration testing capabilities. As part of this strategic investment I'm now on the lookout for a number of experienced penetration testers to join the team. This is a genuine opportunity for a penetration tester to deliver impactful testing work - without getting side lined with adjacent tasks or red tape! If you … of testing disciplines with full investment for training & certifications (including those you personally want to go for) this could be for you. What you'll be doing As a penetration tester you will deliver high-quality tests across a range of environments: Internal/External Infrastructure WebApp, API's Hardware & Embedded Software Produce clear, concise and actionable reports More ❯

If you're looking to join an established organisation expanding their penetration testing capabilities. As part of this strategic investment I'm now on the lookout for a number of experienced penetration testers to join the team. This is a genuine opportunity for a penetration tester to deliver impactful testing work - without getting side lined with … of testing disciplines with full investment for training & certifications (including those you personally want to go for) this could be for you. What you'll be doing As a penetration tester you will deliver high-quality tests across a range of environments: Internal/External Infrastructure WebApp, API's Hardware & Embedded Software Produce clear, concise and actionable reports … for both technical and none technical audiences. Ability to work on your own or collaboratively alongside a skilled team of penetration testers. Engage with clients and internal stakeholders to explain finding and remediation steps wherever appropriate. What's in it for you? Remote first culture - work from anywhere in the UK Salary up to £60,000, depending on experience. More ❯

Pattern: On-Site For 3 Months and Then 3 Days On-Site/2 Days WFH Summary An elite security consultancy has a brand new role for an experienced Penetration Tester to join their team. The role is being offered on a permanent basis from their central London office, close to major transport links. You will be tasked … Web Applications Testing Methodology SSL/TLS , HTTP OSI Model Annual Training and Development Plans Regular Performance Reviews Industry Events and Conferences Apply Now! If you are an experienced Penetration Tester and you are looking to progress with an organisation alongside ambitious and driven professionals, then look no further – this is the role for you! Referrals: If this More ❯

Social network you want to login/join with: Penetration Tester (Mid-Level), Southampton Client: Addition+ Location: Southampton, United Kingdom Job Category: Other EU work permit required: Yes Job Views: 6 Posted: 04.06.2025 Expiry Date: 19.07.2025 Job Description: We are currently recruiting for a dynamic UK technology provider for the role of Penetration Tester (Mid-Level … due to the nature of clients. Full UK Driving License & Access to a vehicle are essential. Experience working in the public sector. Minimum of 3+ years of experience in Penetration Testing. Any of the following Penetration Testing Certifications: CompTIA, OSWE, CRTO, CPT, LPT, CEPT, CCPT, CPENT, CRPT, etc. Strong background and understanding of cybersecurity, with a knowledge of … penetration testing frameworks and methodologies. Strong client-facing skills, with the ability to present and discuss findings remotely or in person. CHECK Team Member (CTM) Certified as a preference. How you'll be rewarded Mentorship from Senior Leaders across the business #J-18808-Ljbffr More ❯

Social network you want to login/join with: Penetration Tester (Mid-Level), Crawley, West Sussex Client: Addition+ Location: Crawley, West Sussex, United Kingdom Job Category: Other EU work permit required: Yes Job Views: 16 Posted: 18.06.2025 Expiry Date: 02.08.2025 Job Description: We are currently recruiting for a dynamic UK technology provider for the role of Penetration Tester (Mid-Level). This is a fantastic opportunity to join a business known for its cutting-edge connectivity, cloud, and communications solutions. Role Overview *CANDIDATES MUST BE BASED IN THE UK* Location: Remote with ad hoc travel to customer sites. What you'll be doing: Conduct a variety of IT security engagements and ensure client deliverables meet … due to the nature of clients. Full UK Driving License & Access to a vehicle are essential. Experience working in the public sector. Minimum of 3+ years of experience in Penetration Testing. Any of the following Penetration Testing Certifications: CompTIA, OSWE, CRTO, CPT, LPT, CEPT, CCPT, CPENT, CRPT, etc. Strong background and understanding of cybersecurity, with a knowledge of More ❯

We are currently recruiting for a dynamic UK technology provider for the role of CTM Penetration Tester . This is a fantastic opportunity to join a business known for its cutting-edge connectivity, cloud, and communications solutions. Role Overview *CANDIDATES MUST BE BASED IN THE UK* Location: Remote with occasional travel to customer sites. What you'll be …/Requirements Check Team Member (CTM) Certification. Eligibility for Security Clearance due to client requirements. Full UK Driving License & access to a vehicle. Minimum of 3+ years experience in Penetration Testing. Strong cybersecurity background with knowledge of testing frameworks and methodologies. Excellent client-facing skills, capable of presenting and discussing findings remotely or in person. How you'll be More ❯

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 tests across some of the most sensitive environments 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 and into deep, hands-on testing — this is the place to do it. ? What You’ll Be Doing Deliver end-to … 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 ❯

Company Overview: Ruptura InfoSecurity are a leading provider of penetration testing and offensive cyber security solutions. We allow organisations to identify risks through targeted and highly specialised penetration testing engagements. We are headquartered in the UK, but have a global reach with offices in Dubai. As a trusted provider of cyber security services we allow businesses to mitigate … are looking to bring on juniors, mid level and senior consultants. If you are the top of your existing cohort, we want you. If you are the 'go-to' tester in your current position, we want you. If you are technically minded and live and breath cyber, we want you. If you want to work somewhere where you are … surrounded by some of the best global penetration testing talent, we want you. We aren't looking for an average tester to work on average engagements, we want those at the top of their game. Key Responsibilities: Conduct comprehensive penetration testing and adversary simulation engagements against client environments. Analyse results and produce highly detailed reports containing impact More ❯

Social network you want to login/join with: Ruptura InfoSecurity are a leading provider of penetration testing and offensive cyber security solutions. We allow organisations to identify risks through targeted and highly specialised penetration testing engagements. We are headquartered in the UK, but have a global reach with offices in Dubai. As a trusted provider of cyber … are looking to bring on juniors, mid level and senior consultants. If you are the top of your existing cohort, we want you. If you are the 'go-to' tester in your current position, we want you. If you are technically minded and live and breath cyber, we want you. If you want to work somewhere where you are … surrounded by some of the best global penetration testing talent, we want you. We aren't looking for an average tester to work on average engagements, we want those at the top of their game. Key Responsibilities: Conduct comprehensive penetration testing and adversary simulation engagements against client environments. Analyse results and produce highly detailed reports containing impact More ❯