26 to 50 of 194 Penetration Tester Jobs

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 ❯

Join to apply for the Senior Penetration Tester/Check scheme CTL/CSTL Consultant role at Resillion Get AI-powered advice on this job and more exclusive features. Company Description Resillion is a global company with end-to-end capabilities: no matter your industry, your geographical location, or stage in your digital journey. With offices in North … cyber security, or data-protection, the experts at Resillion do whatever it takes. We work as long and hard as necessary to get you to market. Job Title: Senior Penetration Tester/Check scheme CTL/CSTL Consultant - Permanent role Location: UK Wide - Remote Working, Exciting long-term projects This is an exciting opportunity to join one of … should have the ability to take initiative, learn quickly on the job, and deal with issues as they arise in a high-pressure environment. You will be an enthusiastic tester with a few years of experience, passionate about working in the security industry, and constantly researching the latest vulnerabilities to stay at the industry’s leading edge. You must More ❯

Job Title: Penetration Tester Location: Leeds/Hybrid Reports To: Head of Cyber Services Salary: £55,000 - £60,000 Travel: Occasional client site visits About Us We're a rapidly growing cybersecurity reseller and MSP delivering cutting-edge security solutions across network, endpoint, cloud, and offensive security testing. Our mission: empower clients to expose and eliminate critical vulnerabilities … before attackers do. We're expanding our offensive security team and need an experienced Penetration Tester to deliver high-impact, real-world security assessments that drive tangible improvements. The Role - What You'll Own You will simulate sophisticated cyberattacks across client environments - from networks and web apps to cloud and endpoints - exposing weaknesses before adversaries can exploit them. … Your findings will guide clients to stronger, more resilient security postures. Lead internal and external penetration tests , including infrastructure, web, wireless, cloud, and social engineering. Execute red team, purple team, and breach simulation exercises tailored to client maturity and objectives. Identify and safely exploit vulnerabilities to demonstrate real business impact . Deliver clear, actionable reports tailored to both technical 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 ❯

PENETRATION TESTER: Senior and Expert Levels Location: Chantilly, VA US Security Clearance Requirement: TS/SCI with Full Scope Polygraph Clearance Status: Must be Current JOB DESCRIPTION: Inferno Systems is currently looking for Penetration Tester positions with a minimum of 7+ years experience conducting technical security and/or vulnerability assessments. Please note the security clearance … requirement above: candidates MUST have a current/active TS/SCI with Full Scope Poly to be considered. JOB SUMMARY: We are looking for Penetration Testers whose work will directly impact U.S. policymakers, military officials and law enforcement agencies. You should be able to use sophisticated techniques to identify vulnerabilities, exploit them, and gain and maintain access to … center architecture. • Understanding in cloud computing platform technologies such as AWS, Microsoft Azure, Google, cloud computing environment and cloud security. • Demonstrated real world experience performing gray and black box penetration testing. • Strong familiarity with some of the following: OWASP top 10, DoD and NSA Vulnerability and Penetration Testing Standards. • Understanding of basic IP fundamentals and how protocols work More ❯

Sr. Penetration Tester Job Category: Engineering Time Type: Full time Minimum Clearance Required to Start: TS/SCI with Polygraph Employee Type: Regular Percentage of Travel Required: None Type of Travel: None The Opportunity: Are you ready to shape the future of intelligence systems? CACI is seeking a talented Penetration Tester to join our team in … your career. You can learn more about our program by accessing the landing page: VORPAL Jobs () Responsibilities: You will lead small project teams with specific experience planning and executing penetration tests in a Windows environment. You will be called upon to solve technical puzzles every day using your breadth of computer, network, and applications pen-testing experience. As a … have an active TS/SCI with required Polygraph clearance University Degree or equivalent experience and minimum of 15+ years of related work experience Must have expertise in Windows penetration testing tools and techniques Ability to clearly communicate findings through written and oral products System level and security administration knowledge of computer operating systems. Operating system experience shall be More ❯

Join our dynamic Offensive Security Team! As we expand, we are looking for a Pentester/Red Teamer who is enthusiastic about undertaking a range of security assessments, including penetration testing, red team exercises, vulnerability scanning, and physical access evaluations for our clients. Key Responsibilities: Client Engagement Management: Lead client projects, ensuring clear communication, timely delivery, and exceeding expectations. … Act as the primary liaison, providing updates and guidance. Security Assessment Execution: Conduct detailed security assessments, including penetration testing and vulnerability analysis. Systematically identify and document vulnerabilities across network, application, and physical layers. Prepare concise reports for both technical and non-technical stakeholders. Red Team Challenges: Participate in red team simulations, encompassing social engineering attacks and advanced penetration … security. Technical Proficiencies: Python/Scripting: Demonstrate a high level of proficiency in Python, essential for writing custom scripts to automate tasks, analyze data, and develop unique tools for penetration testing. This skill is crucial for tailoring attacks, parsing data, and creating efficient workflows in security assessments. Linux/Windows Proficiency: Have a thorough understanding of Linux/Windows More ❯

Penetration Tester required for my client based in Leeds/London – visit office 2 x per month. This is a permanent opportunity. Salary approx. £50-80k. Are you a skilled ethical hacker with a passion for uncovering vulnerabilities? My client are a fast-growing cybersecurity reseller/MSP delivering cutting-edge security solutions across multiple sectors. The … Role: As the Penetration Tester, you’ll simulate cyberattacks on client environments—testing networks, apps, cloud platforms, and more—to expose weaknesses and recommend fixes. You’ll work on red/purple team engagements, social engineering tests, and cloud security assessments, delivering high-impact reports that drive real security improvements. What You’ll Do: Perform infrastructure, web app … wireless, and cloud penetration tests Execute red team simulations and assumed breach scenarios Craft clear, actionable reports for both technical and executive audiences Stay ahead of emerging threats, exploits, and attack techniques Collaborate with cyber, managed services, and compliance teams Skills You’ll Need: 2–5+ years in penetration testing (network, web, cloud, etc.) Mastery of tools like More ❯

Penetration Tester required for my client based in Leeds/London – visit office 2 x per month. This is a permanent opportunity. Salary approx. £50-80k. Are you a skilled ethical hacker with a passion for uncovering vulnerabilities? My client are a fast-growing cybersecurity reseller/MSP delivering cutting-edge security solutions across multiple sectors. The … Role: As the Penetration Tester, you’ll simulate cyberattacks on client environments—testing networks, apps, cloud platforms, and more—to expose weaknesses and recommend fixes. You’ll work on red/purple team engagements, social engineering tests, and cloud security assessments, delivering high-impact reports that drive real security improvements. What You’ll Do: Perform infrastructure, web app … wireless, and cloud penetration tests Execute red team simulations and assumed breach scenarios Craft clear, actionable reports for both technical and executive audiences Stay ahead of emerging threats, exploits, and attack techniques Collaborate with cyber, managed services, and compliance teams Skills You’ll Need: 2–5+ years in penetration testing (network, web, cloud, etc.) Mastery of tools like More ❯

Security Testing Consultant (Pen Tester) Location: London SE1 Salary: £45,000 - £60,000 depending on relevant experience Hours: Full-time, Monday to Friday Work Location: Office-based during probation, then hybrid (3 days office/2 days WFH) Full time/Permanent Remarkable Jobs are recruiting on behalf of a dynamic and growing cybersecurity organisation. We are seeking a … Security Testing Consultant (Pen Tester) to join their expert team in London SE1. This is a fantastic opportunity for an experienced professional to take on a varied, high-impact role conducting in-depth security assessments across multiple platforms. Security Testing Consultant (Pen Tester) Role: As a Security Testing Consultant (Pen Tester) , you will play a vital role … platforms, APIs, and mobile technologies. You'll be part of a collaborative team, providing expert guidance and helping to ensure the highest standards of cybersecurity. Security Testing Consultant (Pen Tester) Key Responsibilities: Deliver penetration testing across web, cloud, mobile, and infrastructure Conduct black box, grey box, and white box testing Produce detailed reports and deliver findings to clients 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 ❯

Penetration Tester - Remote About the Role Lorien are seeking a talented and motivated Penetration Tester to join our clients growing cybersecurity team on a fully remote basis (mainland UK only). You will be responsible for conducting ethical hacking and security testing engagements to identify vulnerabilities in client systems, applications, and infrastructure. This is an exciting … opportunity to work across a range of industries while further developing your skills in a supportive and professional environment. Key Responsibilities Plan and perform penetration tests on networks, web applications, APIs, cloud environments, and other systems. Deliver clear, actionable technical and executive reports to clients. Collaborate with internal teams to ensure quality and compliance with best practices. Stay up … CCTIM Certified Must be currently residing in mainland UK . Eligible for UK security clearance (must have been a UK resident for at least 5 years). Experience conducting penetration tests (web, infrastructure, external/internal). Strong knowledge of security testing methodologies and frameworks (e.g., OWASP, NIST). Proficiency with industry-standard tools (e.g., Burp Suite, Nmap, Metasploit More ❯

Penetration Tester - Remote About the Role Lorien are seeking a talented and motivated Penetration Tester to join our clients growing cybersecurity team on a fully remote basis (mainland UK only). You will be responsible for conducting ethical hacking and security testing engagements to identify vulnerabilities in client systems, applications, and infrastructure. This is an exciting … opportunity to work across a range of industries while further developing your skills in a supportive and professional environment. Key Responsibilities Plan and perform penetration tests on networks, web applications, APIs, cloud environments, and other systems. Deliver clear, actionable technical and executive reports to clients. Collaborate with internal teams to ensure quality and compliance with best practices. Stay up … CCTIM Certified Must be currently residing in mainland UK . Eligible for UK security clearance (must have been a UK resident for at least 5 years). Experience conducting penetration tests (web, infrastructure, external/internal). Strong knowledge of security testing methodologies and frameworks (e.g., OWASP, NIST). Proficiency with industry-standard tools (e.g., Burp Suite, Nmap, Metasploit 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 ❯

This position is contingent upon funding with an expected start date of December 2025 Top Secret/SCI Clearance required SRG is seeking a Red Team Penetration Tester III, you will be responsible for leading and executing complex penetration testing events and conducting offensive cybersecurity operations for the U.S. Government and DoD systems. You will work collaboratively … or Offensive Security Certified Expert (OSCE), or Offensive Security Exploitation Expert (OSEE), or Offensive Security Wireless Professional (OSWP) certification. Experience: • Seven (7) years of full-time professional experience conducting penetration testing or offensive Cyber operations in the following areas: o Developing and utilizing penetration tools such as Metasploit, NMAP, Kali Linux, Cobalt Strike. o Mimicking threat behavior. o … Cyber Networking Certifications Cisco Certified Network Professional (CCNP) certification CCIE (Cisco Certified Internetwork Expert) CISSP (Certified Information Systems Security Professional) Seven (7) years of full-time professional experience conducting penetration testing or offensive Cyber operations in each of the following areas: Developing and utilizing penetration tools such as Metasploit, NMAP, Kali Linux, Cobalt Strike. Mimicking threat behavior. Utilizing More ❯

This position is contingent upon funding with an expected start date of December 2025 Top Secret/SCI Clerance required SRG is seeking a Red Team Penetration Tester IV, you will be responsible for leading and executing complex penetration testing events and conducting offensive cybersecurity operations for the U.S. Government and DoD systems. You will work collaboratively … following certifications: Offensive Security Certified Expert (OSCE), Offensive Security Exploitation Expert (OSEE), or Offensive Security Wireless Professional (OSWP) certification. Experience: • Ten (10) years of full-time professional experience conducting penetration testing or offensive Cyber operations including demonstrated experience in the following areas: o Developing and utilizing penetration tools such as Metasploit, NMAP, Kali Linux, Cobalt Strike. o Mimicking … Cyber Networking Certifications Cisco Certified Network Professional (CCNP) certification CCIE (Cisco Certified Internetwork Expert) CISSP (Certified Information Systems Security Professional) Seven (7) years of full-time professional experience conducting penetration testing or offensive Cyber operations in each of the following areas: Developing and utilizing penetration tools such as Metasploit, NMAP, Kali Linux, Cobalt Strike. Mimicking threat behavior. Utilizing 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 ❯

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 ❯

Cyber Security - Penetration Tester Location: Belfast Hybrid (2 days in office/client site as required) Type: Full-time | Flexible working hours | Hybrid Our client is a long established and independent cyber security firm based in Belfast. As the premier NCSC-approved supplier for CHECK Penetration Testing in Northern Ireland, including Cyber Incident Exercising being conducted at … continue to grow, having recently secured several high-impact, multi-year contracts across Northern Ireland, they're strengthening their technical team to meet demand. They are looking for experienced Penetration Testers who are passionate about cyber security, thrive on technical challenges, and want to be part of a trusted and growing consultancy. What You'll Be Doing: Conducting penetration … technical debriefs. Staying ahead of evolving threats, techniques and industry standards. Supporting the continuous development of internal tools, methodologies and capability. What They're Looking For: Demonstrable experience in penetration testing (2+ years). CTL or CTM status, or equivalent. All CHECK Team Leaders (CTL) must hold a UK CSC Professional Title at Principal level or above. Solid knowledge 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 ❯

Role Overview: We are seeking a driven and technically proficient Penetration Tester. The ideal candidate will have solid experience in performing end-to-end Vulnerability Assessments and Penetration Testing (VAPT) across various environments, possess strong reporting and scripting skills, and demonstrate the ability to engage with clients during both pre-sales and project delivery phases. This is an … excellent opportunity for someone looking to grow their career within a CREST-accredited organization that delivers high-impact services to critical industries. Responsibilities: Penetration Testing & Security Assessments Plan, execute, and document penetration tests on web applications, mobile apps, APIs, infrastructure, cloud environments, and internal/external networks. (Black, Grey, White pentest) Perform source code reviews to uncover insecure … including technical scoping, requirement gathering, and proposal development. Participate in client-facing meetings to explain findings, provide mitigation advice, and manage expectations when needed. Requirements: Minimum 4 years of penetration testing experience CREST CRT and CPSA certified (preferred) Other Security certifications: OSCP, OSWP, HTB, CBBH, CISSP (Bonus) Red Team experience (Bonus) Strong knowledge of OWASP Top 10, MITRE ATT More ❯

Senior Penetration Tester – (UK only - Must be eligible for Security Clearance) Location: UK (Leeds, Bristol, London or Remote) Salary - £45k - £60k Step up your game in cybersecurity. We’re looking for an experienced Senior Penetration Tester who thrives on pushing boundaries, thinks like an attacker, and delivers like a pro. You’ll be joining a tight … knit team of passionate ethical hackers tackling high-impact, real-world cyber threats across both government and commercial landscapes. What You’ll Be Doing: Lead and deliver hands-on penetration tests Mentor junior testers and review technical outputs Collaborate with clients and provide expert guidance Feed into proposals and help shape strategic direction Continuously grow your technical and consulting … skills What You’ll Need: ✔ NCSC CHECK Team Member status ✔ Solid UK penetration testing experience (ideally across varied environments) ✔ Technical depth in networks, systems, and application testing ✔ Strong communication and reporting skills ✔ A hacker mindset and the drive to stay ahead of evolving threats ✔ Clear and demonstrable understanding of penetration testing and red-teaming including NCSC and CREST More ❯

Penetration Tester – UK Remote – £60,000 - £80,000 + Benefits Our client, a leading UK Cyber Security Consultancy, is looking for an experienced Mobile Application Penetration Tester to join their Offensive Security function. Our client offers a range of penetration testing services, including red teaming engagements, providing opportunities to work on diverse client projects and … lead engagements from the forefront. Key Responsibilities: Conduct mobile application penetration testing across Android and iOS platforms, assessing security vulnerabilities. Engage in red teaming exercises to simulate real-world attack scenarios against enterprise applications. Evaluate API security, network communications, cryptographic implementations, and mobile backend security. Perform manual and automated exploitation, including tampering, code injection, authentication bypass, and malware analysis. … Utilize industry-leading tools such as Burp Suite, MobSF, Frida, Objection, IDA Pro, and other mobile security frameworks. To Be Considered for This Role: Proven experience in penetration testing mobile applications, focusing on Android and iOS security. Expertise in reverse engineering, dynamic analysis, API security testing, and mobile exploit development. Familiarity with OWASP Mobile Top 10 and secure coding More ❯