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Penetration Tester

Posted: 18/06/26
Recruiter:Big Red Recruitment Midlands Limited
Reference:3124124948
Type:Permanent
Disciplines: Testing
Salary:Competitive
Location:London
Description: We 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.

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