Job Description

Penetration Tester

PCD270095

Clerkenwell, Greater London
Contract
Outside IR35

Job Description

Infrastructure Penetration Tester

An organisation is delivering a significant multi-phase testing programme and is looking for an experienced Infrastructure Penetration Tester to join the team.

This role will focus on hands-on penetration testing across external and internal networks, reviewing system configurations, and identifying vulnerabilities within critical infrastructure.

Key Responsibilities

Conduct comprehensive external and internal infrastructure penetration tests, starting with perimeter systems and moving into internal networks.

Perform configuration reviews across servers, firewalls, routers, and network devices.

Execute API security testing to assess authentication, data access, and integration risks.

Deliver CHECK-style network and infrastructure testing in line with industry standards.

Collaborate with the project lead and wider team across a six-phase testing programme.

Required Skills and Experience

Proven background in infrastructure penetration testing within complex network environments.

Strong understanding of networking, configuration management, and common attack vectors.

Experience performing API and configuration reviews.

Excellent report writing and communication skills for both technical and non-technical audiences.

Ability to work on-site in London for key phases of testing.

Collaborative mindset, with the ability to work as part of a small testing team of 3-4 people.

Additional Information

Contract role.

Outside IR35.

If you are an Infrastructure Penetration Tester with experience across networks, configurations, and APIs, and you are looking for a hands-on role in a collaborative team delivering a major London-based project, this could be a strong opportunity.