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Junior/Mid Penetration Tester/ Check scheme must hold - CTM/CSTM with SC. You will be an enthusiastic tester with a few years of experience under your belt. You will be part of a talented and collaborative international team who are positioning Resillion as an industry leader in delivery of pene

Senior Information Security Tester / Senior Penetration Tester. This is a highly visible, hybrid role combining hands-on penetration testing with strategic input, stakeholder engagement, and mentoring responsibilities. API, and infrastructure penetration testing.

Penetration Tester (CHECK Team Member). Penetration Tester (CHECK Team Member). Deliver high-quality penetration tests and vulnerability assessments.

Security testing professionals, including penetration testers and security analysts, are responsible for identifying, analyzing, and mitigating vulnerabilities in software, systems, and networks.

Have solid experience in penetration testing and offensive security.

Perform hands‑on penetration testing across hardware, software, and telecoms‑specific technologies to identify vulnerabilities in complex systems. Have a background in infrastructure, networking, or software development and hands‑on penetration testing experience (this is not an entry level ro

LSEG is seeking a senior penetration tester to join our internal offensive security team. Conduct in‑depth penetration tests on applications, infrastructure, and cloud environments. Take full ownership of assigned penetration testing engagements end‑to‑end and deliver with limited oversight.

A leading cybersecurity consultancy in the UK is seeking a skilled Senior Penetration Tester to join their Cyber Security practice. The role involves leading penetration testing engagements, providing technical advice on security technologies, and contributing to innovative cybersecurity solutions.

Darkshield is seeking an experienced Penetration Tester in York, UK, to conduct security assessments and ethical hacking.

A-LIGN will depend on you as the Penetration Tester to support management, plan and execute sophisticated penetration tests, and ensure the ongoing protection of our clients’ most critical systems and data. The Penetration Tester works to execute department activities and deliver high-quality secu

Capgemini is seeking a skilled Penetration Tester within its Cybersecurity Practice in the UK. Candidates should be CTM certified and possess a strong grasp of penetration testing tools and techniques. This role involves identifying and managing security risks for clients by conducting detailed pene

Paragon Alpha - Hedge Fund Talent Business is seeking an experienced Penetration Tester to join their internal security team. The ideal candidate must be comfortable with penetration testing, able to communicate well with technical teams, and possess a genuine curiosity about system vulnerabilities.

A leading quantitative investment management firm is looking to hire a Penetration Tester to join its established Security Assurance function. The hire will own internal penetration testing end-to-end and play a meaningful role in shaping the firm's adversarial testing capability. Plan and conduct p

Dataannotation is seeking experienced cybersecurity professionals to contribute to cutting-edge AI development.You'll evaluate AI-generated security content, work on technical issues, and provide feedback to shape AI systems.This independent contractor position offers competitive pay, flexible hours

We are looking for team members who are eager to learn, drive to excel, and have excellent technical knowledge of security concepts and proven expertise in penetration testing. Design and execute testing and simulations – such as penetration tests, technical controls assessments, cyber exercises,

You will conduct penetration tests, assess application security, and engage with development teams to improve security practices.

As an experienced Penetration Tester at Starling, you’ll be joining an established team, working with talented cyber security professionals to ensure our services are designed, developed and operated securely. Being an internal tester, you’ll gain a strong understanding of how technology works a

We are looking for an experienced Penetration Tester to join our team. We help organisations navigate an increasingly complex digital landscape by providing expert services in penetration testing, vulnerability assessment, managed security, and more. Conduct penetration testing on networks, applicat

We have an exciting opportunity for a Senior Penetration Tester to join our thriving Cyber Security practice. We are seeking a skilled individual, with expertise in penetration testing or vulnerability research, who can contribute to the development of innovative solutions and security outcomes to s

Barclay Simpson is seeking an experienced Penetration Tester to join their team in Greater London.

Bridewell is seeking an experienced Senior Penetration Tester to deliver high-quality security assessments and work on exciting projects.

Sanderson is seeking a Senior Information Security Tester to join a growing cyber security team in the United Kingdom. This hybrid role involves conducting web application and API penetration testing while engaging with stakeholders and mentoring junior team members.

Mistral is seeking a hands-on Penetration Tester in Greater London to join our Offensive Security team. Your expertise will help shape how AI transforms penetration testing.

Conduct hands‑on penetration testing within a dedicated in‑house lab environment, ensuring safe and controlled testing. Have strong experience in penetration testing, with a solid understanding of exploitation techniques and how they apply in real‑world environments.

Security Penetration Tester for a contract role in the East Midlands. This hybrid position involves working three days a week, with an immediate start, to enhance the company's internal penetration testing capabilities. Ideal candidates will have proven experience in penetration testing, strong vuln

Alice (Formerly ActiveFence) is looking for a Senior Penetration Tester to join their security research division in the United Kingdom. The position involves leading advanced penetration tests on web applications and enterprise systems, engaging in Red Team projects, and developing security tools.

A cybersecurity firm in Greater London seeks a Penetration Tester to plan and conduct ethical hacking exercises and identify vulnerabilities in systems.

Roles include security analysts, penetration testers, and threat intelligence specialists.

UBDS Digital seeks a Senior Penetration Tester to lead various engagements and maintain CHECK Green Status while supporting customer needs. The ideal candidate will possess relevant CTL qualifications, demonstrate strong leadership skills, and have a passion for penetration testing.

Capital One Offensive Security reduces cyber risk by uncovering vulnerabilities and weaknesses in the enterprise cyber environment through coordinated ethical hacking and penetration testing scenarios. Perform penetration testing of APIs, web applications, networks, and cloud services, as well as re

We have an exciting opportunity for a Senior Penetration Tester to join our thriving Cyber Security practice. We are seeking a skilled individual, with expertise in penetration testing or vulnerability research, who can contribute to the development of innovative solutions and security outcomes to s

A leading digital bank is seeking an experienced Penetration Tester to join their cybersecurity team. You will be responsible for conducting penetration tests and collaborating with engineering teams to enhance security measures.

The successful candidate will identify and remediate application-layer vulnerabilities and conduct penetration tests while advising development teams on secure coding practices. This role requires strong experience in software engineering or security operations with demonstrated expertise in secure

Hack The Box is looking for a Senior Penetration Tester to join their offensive security team in Greater London. This role involves conducting penetration tests on applications, infrastructure, and cloud environments. Candidates should have proven experience in penetration testing, proficiency with

Familiarity with vulnerability assessment and penetration testing techniques. At least 1-2 years of experience in penetration testing. We are on the hunt for an expert in Penetration Testing.

Paragon are working with a systematic hedge fund, looking for an experienced Penetration Tester to join their internal security team. Scope: performing hands‑on penetration testing, running adversary simulations, and helping engineers understand how attackers actually think. Strong penetration tes

Familiarity with penetration testing tools such as BurpSuite, OWASP Zap, SoapUI etc. Penetration testing experience with Internet of Things (IoT) devices, mobile applications, or code review. Capital One Offensive Security reduces cyber risk by uncovering vulnerabilities and weaknesses in the enterp

As an experienced Penetration Tester at Starling, you’ll be joining an established team, working with talented cyber security professionals to ensure our services are designed, developed and operated securely. Second stage with additional members of the Penetration Testing team. Being an internal

FSP is seeking a skilled Senior Penetration Tester to join their Cyber Security practice in Greater London. The ideal candidate will have at least 2 years of experience in penetration testing or vulnerability research, and be proficient in programming languages like C/C++, C#, Java, and Python.

A-LIGN in Greater London is looking for a skilled Penetration Tester to execute high-quality security assessments for diverse clients. You will perform various penetration tests and guarantee the ongoing protection of clients' critical systems and data. A qualification in cybersecurity and at least

Pen Test Partners LLP is seeking an enthusiastic security consultant to join their team in the UK.This role includes delivering pen testing services for various clients, from presales to delivery and debriefs.Applicants should have a minimum of two years' experience in pen testing and be familiar wi

A premier consulting firm in London is seeking a skilled penetration tester. The ideal candidate will possess certifications like OSCP or CREST and experience in various penetration testing fields.

Capital One is seeking a Penetration Tester to reduce cyber risk through ethical hacking and security assessments. This position involves performing penetration testing for applications and networks, enhancing security standards, and collaborating with development teams.

As an experienced Penetration Tester at Starling, you’ll be joining an established team, working with talented cybersecurity professionals to ensure our services are designed, developed and operated securely. Being an internal tester, you’ll gain a strong understanding of how technology works at

Being the Lead Penetration Tester on a wide portfolio of penetration testing engagements including complex CHECK engagements and ITHCs as well as large projects for our key clients. B Data Security (part of UBDS Group) are looking for a skilled and experienced Senior Penetration Tester who can provi

Uniting Ambition IT Contract is seeking an experienced Senior Security Penetration Tester to join their Information Security function for an initial 3-month contract. The role involves conducting penetration testing to identify vulnerabilities across networks and applications.

A leading information security company in the UK is seeking an experienced penetration tester. This role involves conducting comprehensive penetration tests on various environments, including web applications and Cloud services.