1 to 25 of 46 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 ❯

Senior Penetration Tester – Must be eligible to obtain security clearance We are looking for a Senior Penetration Tester/Ethical Hacker to work freelance for a company who delivers high-quality security solutions for an array of different clients from varied industries. Due to an unprecedented increase in workload, we are looking for a reliable Penetration Tester to work on overflow projects, delivering infrastructure penetration testing, including broader vulnerability assessments and security audits as needed. You will also produce clear, professional reports and deliver testing debriefs. This opportunity would suit someone who is already in a permanent position, looking for freelance work in addition to their main role, or someone who is happy … nature of work and client base, all applicants but be able to obtain SC clearance. Day rate: £400 - £500 per day, London – remote/hybrid Requirements Proven experience in Penetration Testing/Ethical Hacking Strong knowledge of network and cloud infrastructure security. Up-to-date on the latest cybersecurity threats and technologies. Strong knowledge in pen testing tools ( Metasploit 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 ❯

Social network you want to login/join with: Senior Security Penetration Tester, Reading col-narrow-left Client: Thames Water Location: Reading, United Kingdom Job Category: Other - EU work permit required: Yes col-narrow-right Job Reference: 63161ee04201 Job Views: 7 Posted: 22.06.2025 Expiry Date: 06.08.2025 col-wide Job Description: As a Senior Security Penetration Tester … 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 ❯

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 … candidate will possess strong communication 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 cyber security solutions (e.g. vulnerability scanning tools) with existing systems, applications, and infrastructure. Evaluate and recommend technologies, tools, and vendors to meet business 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 ❯

Social network you want to login/join with: Penetration Tester (Infrastructure), slough col-narrow-left Client: Anson McCade Location: slough, United Kingdom Job Category: Other - EU work permit required: Yes col-narrow-right Job Views: 2 Posted: 26.06.2025 Expiry Date: 10.08.2025 col-wide Job Description: 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 critical assessments across complex and sensitive client environments. This is a hands-on internal testing role, not web application focused, where you'll be expected to work independently and navigate challenging systems with confidence. … 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 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 ❯

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 … position suited to someone who thrives in technically demanding scenarios and wants to work alongside a small, elite team of offensive security specialists. Key Responsibilities Lead and execute complex penetration tests and adversary simulations Deliver red team engagements aligned with frameworks like TIBER, CBEST, and MITRE ATT&CK Develop custom tooling and exploits where required Create detailed, client-facing … technical and executive reports Mentor junior testers and contribute to internal R&D Stay sharp: engage in continuous learning and threat landscape analysis About You Proven experience in penetration testing and red teaming (internal, external, app, cloud, etc.) Strong understanding of attacker TTPs and detection evasion Familiarity with frameworks such as OWASP , MITRE ATT&CK , and NIST Experience with More ❯

Senior Penetration Tester, crawley, west sussex Client: Opus Recruitment Solutions Location: crawley, west sussex, United Kingdom Job Category: Other - EU work permit required: Yes Job Views: 3 Posted: 24.06.2025 Expiry Date: 08.08.2025 Job Description: 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 … position suited to someone who thrives in technically demanding scenarios and wants to work alongside a small, elite team of offensive security specialists. Key Responsibilities Lead and execute complex penetration tests and adversary simulations Deliver red team engagements aligned with frameworks like TIBER, CBEST, and MITRE ATT&CK Develop custom tooling and exploits where required Create detailed, client-facing More ❯

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 … position suited to someone who thrives in technically demanding scenarios and wants to work alongside a small, elite team of offensive security specialists. Key Responsibilities Lead and execute complex penetration tests and adversary simulations Deliver red team engagements aligned with frameworks like TIBER, CBEST, and MITRE ATT&CK Develop custom tooling and exploits where required Create detailed, client-facing … technical and executive reports Mentor junior testers and contribute to internal R&D Stay sharp: engage in continuous learning and threat landscape analysis About You Proven experience in penetration testing and red teaming (internal, external, app, cloud, etc.) Strong understanding of attacker TTPs and detection evasion Familiarity with frameworks such as OWASP , MITRE ATT&CK , and NIST Experience with More ❯

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 … position suited to someone who thrives in technically demanding scenarios and wants to work alongside a small, elite team of offensive security specialists. Key Responsibilities Lead and execute complex penetration tests and adversary simulations Deliver red team engagements aligned with frameworks like TIBER, CBEST, and MITRE ATT&CK Develop custom tooling and exploits where required Create detailed, client-facing … technical and executive reports Mentor junior testers and contribute to internal R&D Stay sharp: engage in continuous learning and threat landscape analysis About You Proven experience in penetration testing and red teaming (internal, external, app, cloud, etc.) Strong understanding of attacker TTPs and detection evasion Familiarity with frameworks such as OWASP , MITRE ATT&CK , and NIST Experience with More ❯

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 … position suited to someone who thrives in technically demanding scenarios and wants to work alongside a small, elite team of offensive security specialists. Key Responsibilities Lead and execute complex penetration tests and adversary simulations Deliver red team engagements aligned with frameworks like TIBER, CBEST, and MITRE ATT&CK Develop custom tooling and exploits where required Create detailed, client-facing … technical and executive reports Mentor junior testers and contribute to internal R&D Stay sharp: engage in continuous learning and threat landscape analysis About You Proven experience in penetration testing and red teaming (internal, external, app, cloud, etc.) Strong understanding of attacker TTPs and detection evasion Familiarity with frameworks such as OWASP , MITRE ATT&CK , and NIST Experience with More ❯

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 … position suited to someone who thrives in technically demanding scenarios and wants to work alongside a small, elite team of offensive security specialists. Key Responsibilities Lead and execute complex penetration tests and adversary simulations Deliver red team engagements aligned with frameworks like TIBER, CBEST, and MITRE ATT&CK Develop custom tooling and exploits where required Create detailed, client-facing … technical and executive reports Mentor junior testers and contribute to internal R&D Stay sharp: engage in continuous learning and threat landscape analysis About You Proven experience in penetration testing and red teaming (internal, external, app, cloud, etc.) Strong understanding of attacker TTPs and detection evasion Familiarity with frameworks such as OWASP , MITRE ATT&CK , and NIST Experience with More ❯

Location: portsmouth, hampshire, United Kingdom Job Category: Other - EU work permit required: Yes Job Views: 3 Posted: 24.06.2025 Expiry Date: 08.08.2025 Job Description: 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 hands-on, client-facing position suited to someone who thrives in technically … demanding scenarios and wants to work alongside a small, elite team of offensive security specialists. Key Responsibilities Lead and execute complex penetration tests and adversary simulations Deliver red team engagements aligned with frameworks like TIBER, CBEST, and MITRE ATT&CK Develop custom tooling and exploits where required Create detailed, client-facing technical and executive reports Mentor junior testers and More ❯

Social network you want to login/join with: Penetration Tester (OSCP or similar certified), Guildford Client: Harrington Starr Location: Guildford, United Kingdom Job Category: Other EU work permit required: Yes Job Views: 4 Posted: 26.06.2025 Expiry Date: 10.08.2025 Job Description: Harrington Starr has partnered with a global multi-billion-pound business in Belfast to seek a Vulnerability … and Penetration Testing Engineer for their Belfast Centre team, focusing on security architecture, vulnerability, and risk assessment. We are open to candidates interested in remote work with occasional trips to the Belfast Head Office. Responsibilities: Evaluate proposed and current solutions for compliance with secure system design standards, including ISMS Policy, client contracts, regulatory requirements, and professional obligations. Architect, implement … and support assessment solutions to protect the company's assets. Continuously evaluate products, tools, scripts, and techniques to enhance assessment capabilities. 3+ years in a penetration testing role. Strong knowledge of Vulnerability and Penetration Testing concepts, including WhiteHat/Ethical Hacking. Experience with automated tools like Nessus, Appscan, Burp Suite, Nipper, and Trustwave. Understanding of the difference between More ❯

Social network you want to login/join with: Penetration Tester (OSCP or similar certified) Client: Harrington Starr Location: Woking, United Kingdom Job Category: Other EU work permit required: Yes Job Views: 5 Posted: 26.06.2025 Expiry Date: 10.08.2025 Job Description: Harrington Starr has partnered with a global multi-billion-pound business in Belfast to seek a Vulnerability and … Penetration Testing Engineer for their Belfast Centre. The role involves providing security architecture, vulnerability, and risk assessment. We are open to candidates who may work remotely with occasional trips to the Belfast Head Office. Responsibilities: Evaluate proposed and current solutions for compliance with security standards, including ISMS Policy, client contracts, and regulatory requirements. Architect, implement, and support assessment solutions … to protect the firm's assets. Continuously evaluate and improve assessment tools, scripts, and techniques. Typically 3+ years in a pen test role. Strong knowledge of Vulnerability and Penetration Testing concepts, including ethical hacking. Experience with automated tools like Nessus, Appscan, Burp Suite, Nipper, Trustwave. Understanding the difference between vulnerability assessment and penetration testing. Familiarity with information security More ❯

Social network you want to login/join with: Penetration Tester (OSCP or similar certified), Southampton Client: Harrington Starr Location: Southampton, United Kingdom Job Category: Other EU work permit required: Yes Job Views: 4 Posted: 26.06.2025 Expiry Date: 10.08.2025 Job Description: Harrington Starr has partnered with a global multi-billion-pound business in Belfast to seek a Vulnerability … and Penetration Testing Engineer for their Belfast Centre team, focusing on security architecture, vulnerability, and risk assessment. We are open to candidates interested in remote work with occasional trips to the Belfast Head Office. Responsibilities: Evaluate proposed and current solutions for compliance with secure system design standards, including ISMS policies, client contracts, regulatory expectations, and professional obligations. Architect, implement … and support assessment solutions to protect company assets. Continuously evaluate tools, scripts, and techniques to enhance assessment capabilities. Minimum of r+ years in a penetration testing role. Deep knowledge of Vulnerability and Penetration Testing concepts, including WhiteHat/Ethical Hacking requirements. Experience with automated tools such as Nessus, Appscan, Burp Suite, Nipper, and Trustwave. Understanding the differences between More ❯