14 of 14 Penetration Tester Jobs in London

Title: Penetration Tester (CHECK Team Member) Location: UK (Hybrid/Remote) Experience: 1–3 years Eligibility: UK National (must be eligible for security clearance) About the Role: We're looking for a Penetration Tester (CHECK Team Member) to join our growing cybersecurity team. You'll conduct … network, web, and application security testing for a range of clients, helping identify vulnerabilities and strengthen defences. Key Responsibilities Deliver high-quality penetration tests and vulnerability assessments. Produce clear, actionable reports and remediation guidance. Support CHECK-accredited engagements and collaborate with senior testers. Stay current with new exploits, tools ...

Penetration Tester Permanent – up to £85k per annum London based – hybrid working – 2-3 days office based (negotiable) Must have CREST CRT Role Overview: We are seeking a highly skilled and experienced Offensive Security Consultant with a strong focus understanding on threat intelligence and attack methods. The ideal … candidate will be responsible for managing and conducting advanced penetration testing engagements, leveraging threat intelligence to simulate real-world attacks across a variety of environments, including OT, IT, web applications, cloud infrastructure, and APIs. This role requires a deep understanding of adversarial approaches, excellent communication skills, and the ability ...

Penetration Tester Permanent – up to £85k per annum London based – hybrid working – 2-3 days office based (negotiable) Must have CREST CRT Role Overview: We are seeking a highly skilled and experienced Offensive Security Consultant with a strong focus understanding on threat intelligence and attack methods. The ideal … candidate will be responsible for managing and conducting advanced penetration testing engagements, leveraging threat intelligence to simulate real-world attacks across a variety of environments, including OT, IT, web applications, cloud infrastructure, and APIs. This role requires a deep understanding of adversarial approaches, excellent communication skills, and the ability ...

Penetration Tester - Legal Sector (OT/Live Systems) £750 Per Day Inside IR35 Location: Canary Wharf | 5 days on-site We're looking for an experienced Penetration Tester with proven law/legal sector experience to operate in a high-risk, high-sensitivity environment. This role … fully on-site and involves OT penetration testing on live production systems . You will: Perform penetration testing across IT and OT environments , including live legal systems Safely test operational technology and production platforms without business disruption Assess risk in line with legal, regulatory and client confidentiality requirements ...

Penetration Tester - Legal Sector (OT/Live Systems) £750 Per Day Inside IR35 Location: Canary Wharf | 5 days on-site We're looking for an experienced Penetration Tester with proven law/legal sector experience to operate in a high-risk, high-sensitivity environment. This role … fully on-site and involves OT penetration testing on live production systems . You will: Perform penetration testing across IT and OT environments , including live legal systems Safely test operational technology and production platforms without business disruption Assess risk in line with legal, regulatory and client confidentiality requirements ...

Penetration Tester £55,000 - 65,000 GBP Hybrid WORKING Location: Central London, Greater London - United Kingdom Type: Permanent Role: Pen Tester Location: London Salary: 55K - 65K Working Pattern: Hybrid The Opportunity: We are looking for an experienced Pen Tester to join a global Cyber Technical Services … will be responsible for delivering comprehensive security testing engagements, applying your expertise to safeguard vital systems. What You Will Do as a Pen Tester: Lead end-to-end security testing projects including scoping, execution, and reporting Conduct application, infrastructure, and intelligence-led tests to identify vulnerabilities Produce clear technical ...

Hiring: Senior Penetration Tester (CHECK/CREST) – Fully Remote (GB based) Salary: Up to £70k based on experience | Travel: Client sites when needed | Clearance: Must be eligible for SC Cyber Guarded Ltd is expanding! We're a long-established, independent cyber security company and the leading NCSC CHECK … provider in Northern Ireland now growing across the UK. We're looking for an experienced Penetration Tester (not entry level) to deliver high-assurance testing across infrastructure, web, cloud and OT environments. This is a fully remote role within Great Britain, with occasional client-site visits. What ...

have the expertise and drive to lead complex penetration testing engagements? We're on the lookout for a Senior Penetration Tester to join an established well-structured function; ideal for someone who enjoys autonomy, thrives in technically rewarding environments, and brings experience, leadership, and critical thinking … every engagement. Work alongside a talented team of penetration testers and consultants: Have a voice in shaping our tooling and methodologies, and influence both technical outcomes and the development of rising talent. Key Responsibilities: Lead penetration testing engagements (Web, Infra, Cloud etc) Apply and evolve testing frameworks ...

ReRoot Cyber is seeking a highly skilled and forward-thinking senior penetration tester to join one of the UK's most respected testing teams. They are an impressive technical team with a genuinely collaborative culture who have the full backing from management to deliver nothing but value adding … service lines. If you thrive on bringing ideas to life, creating bespoke tools and adding true value to your clients, then this is the penetration testing team for you. This is a home based position with very very very limited travel (Circa 20%) Full right to work ...

Client is a cybersecurity company who offer security services to multiple businesses across varying industries. They are now looking for a graduate Penetration Tester to join their growing team! Main Duties: Vulnerability Identification: Conduct thorough assessments to identify security vulnerabilities in networks, applications, and systems. Exploitation and Reporting ...

Opportunity ProCheckUp, an elite independent cybersecurity consultancy serving FTSE 100 corporations, UK government authorities, and international financial institutions, is seeking an experienced Penetration Tester with SC Clearance to join our expanding remote team. This is an exceptional opportunity to conduct high-impact security assessments across diverse enterprise environments … mission-critical infrastructure, applications, and network security testing for the UK's most security-conscious organizations. What You'll Do Core Responsibilities: Conduct advanced penetration testing across network infrastructure, web applications, and mobile platforms for enterprise clients Perform vulnerability assessments, threat modelling, and risk analysis across diverse technical environments ...

continued success, we're now expanding our offensive security team with the view to hire two experienced penetration testers, who want more than tick-box testing. If you're looking for autonomy, strong mentorship and genuine investment in your development (training & exams funded) alongside a clear development plan. … Make recommendations where possible to better the practice and introduce new tooling. Shadowing senior testers to deepen your commercial and technical experience. Requirements: Practical penetration testing experience. (Web & Infra as a baseline). Strong desire to progress and broaden your skills. Ability to communicate effectively with the team ...

increasing quality and speed to promote faster business and technology change, as well as a better customer experience. Responsibilities Gather security requirements and define penetration testing scope by reviewing design and interface documents. Prepare detailed test plans, scenarios, and rules of engagement aligned with CREST and OWASP standards. Conduct … penetration testing (REST, GraphQL, SOAP) focusing on authentication, authorization, and business logic flaws. Perform UI/Web application penetration testing for vulnerabilities such as XSS, CSRF, SQL Injection, and session management issues. Identify and document security issues with clear reproduction steps, evidence, and remediation recommendations. Raise defects ...

increasing quality and speed to promote faster business and technology change, as well as a better customer experience. Responsibilities Gather security requirements and define penetration testing scope by reviewing design and interface documents. Prepare detailed test plans, scenarios, and rules of engagement aligned with CREST and OWASP standards. Conduct … penetration testing (REST, GraphQL, SOAP) focusing on authentication, authorization, and business logic flaws. Perform UI/Web application penetration testing for vulnerabilities such as XSS, CSRF, SQL Injection, and session management issues. Identify and document security issues with clear reproduction steps, evidence, and remediation recommendations. Raise defects ...