Penetration Tester in England

Job description

Role: Penetration Tester (Infrastructure Focus)

Work Type & Location: Hybrid – London preferred (other UK cities possible)

Role Type: Permanent

Salary: £70,000–£105,000 (London) depending on experience

Other regional packages available for Cambridge, Manchester, Bristol, or Edinburgh

Our client – a global innovation consultancy – is expanding its Digital & Data capability and is on the lookout for an experienced Penetration Tester (Infrastructure Focus) to join a high-trust, hands-on team. This role is all about deep technical work inside live infrastructure environments – think Active Directory, internal networks, and sensitive systems where precision matters.

If you’re the kind of tester who thrives in complex, undocumented environments and enjoys real-world impact over checkbox testing, this is the challenge for you.

As a Penetration Tester (Infrastructure Focus), you will:

• Deliver internal infrastructure tests in high-risk, high-impact environments
• Focus on Active Directory, lateral movement, and privilege escalation techniques
• Communicate directly with clients to present findings and advise on remediation
• Produce clear, actionable reports for both technical and non-technical stakeholders
• Contribute to improving internal tooling and methodologies
• Work with autonomy and initiative – this is a consulting-facing role requiring independence

What you bring:

• 4+ years of hands-on experience in infrastructure penetration testing
• Strong expertise in AD exploitation, lateral movement, and privilege escalation
• Confident working in live production and legacy environments
• High command-line fluency (Windows & Linux)
• Strong client communication and reporting skills

It’d be great if you also have:

• Python scripting skills for tooling or automation
• Experience or awareness of Operational Technology (OT) environments
• Familiarity with internal exploitation tools and techniques
• Certifications like CREST CTM/CTL/CSTM, Cyber Scheme Practitioner, or OSCP (lapsed certs accepted if skills are current)

What to expect:

• A small, high-trust team (2–3 testers) operating with autonomy and technical depth
• Hybrid work model (typically remote 80% of the time), with 2 days/week on-site or at client locations
• Meaningful projects in defence, critical infrastructure, and high-security sectors
• Real responsibility and room to influence tooling, process, and delivery
• A hands-on technical interview including an AD lab simulation and live debrief

Location & Clearance:

• London preferred, but open to candidates UK-wide based on flexibility
• Must be SC clearable (current SC clearance is a strong advantage)

Other regional packages available for Cambridge, Manchester, Bristol, or Edinburgh

Apply now to become a Penetration Tester (Infrastructure Focus) and help secure the systems that matter most.

Extra information

Status

Open

Education Level

Secondary School

Location

England

Type of Contract

Part-time jobs

Published at

20-06-2025

Full UK/EU driving license preferred

No

Car Preferred

No

Must be eligible to work in the EU

No

Cover Letter Required

No

Languages

English