Full job descriptionWe are seeking a Penetration Tester to join a growing Offensive Security team within a specialist cyber security consultancy. This is an exciting opportunity to join at a time of significant investment and growth, helping to strengthen existing testing services while contributing to the development of new capabilities across areas such as Red Teaming, Operational Technology (OT), Threat-Led Security Testing and emerging technologies.

The successful candidate will play a key role in delivering penetration testing engagements, supporting process improvement initiatives, and helping to build a scalable and mature testing function. This position offers excellent opportunities for professional development, certification support and future progression into senior or leadership positions.

JOB ROLE - PENETRATION TESTER

LOCATION - LONDON (OCCASIONAL ON-SITE WORK)

SALARY - £45,000-£55,000 + BENEFITS

Key Responsibilities*Conduct vulnerability assessments and penetration testing engagements across: *Internal infrastructure
*External infrastructure
*Web applications
*Networks and systems

*Perform configuration and build reviews using recognised security frameworks and benchmarks.
*Produce clear, concise and actionable technical reports detailing findings, risk ratings and remediation recommendations.
*Utilise industry-standard security testing tools including Burp Suite, Nessus, Metasploit, Nmap, Wireshark and related technologies.
*Work directly with clients and stakeholders, presenting findings and providing remediation guidance where required.
*Support the continuous improvement of testing methodologies, processes and documentation.
*Assist in creating and maintaining standard operating procedures, testing guides and knowledge-sharing materials.
*Collaborate with wider cyber security teams to support service development and research initiatives.
*Contribute to research and development activities across new security testing disciplines and technologies.
*Participate in occasional out-of-hours and on-site engagements where client requirements dictate.
Required Skills & Experience*Minimum 2–3 years’ experience in penetration testing, vulnerability assessment or offensive security.
*Experience conducting: *Internal and external infrastructure testing
*Web application security testing
*Security assessments and audits
*Vulnerability identification and validation

*Strong understanding of networking concepts, protocols, routing and firewall technologies.
*Experience working with Windows, Linux and macOS environments.
*Familiarity with security assessment tools such as: *Burp Suite
*Nessus
*Metasploit
*Nmap
*Wireshark

*Experience producing high-quality technical reports and client-facing documentation.
*Excellent communication and stakeholder management skills.
*Strong organisational skills and ability to manage workload independently.
*Comfortable working in a consultancy or client-facing environment.
*Eligible to obtain UK Security Clearance.
Desirable Skills & Certifications*CREST CRT, CPSA, CCT or equivalent certification.
*OSCP or similar offensive security qualification.
*Cyber Scheme accreditation.
*CHECK Team Member status.