Penetration Tester - Outside IR35

Experis - ManpowerGroup; City Of London; Remote; GBP 80,000 - 100,000; Full time

Job summary

A leading technology recruitment firm is seeking an experienced Penetration Tester for a 12-month remote contract. You will support a large-scale international security programme by delivering high-quality penetration tests and security assessments. Candidates should have strong experience in web and infrastructure testing and proficiency with security tools and methodologies. The role offers flexibility with Outside IR35 engagement.

Qualifications

• Strong experience in web and infrastructure penetration testing.
• Proficiency with offensive security tooling and methodologies.
• Ability to produce clear, structured, executive-level reporting.
• Knowledge across network security, application security, cryptography and authentication.
• SC / NATO SECRET security clearance (or eligibility to obtain).
• Relevant certifications (OSCP, OSCE, OSWE, GPEN, CREST) beneficial.

Responsibilities

• Plan, execute and report on testing activities.
• Deliver briefs to both technical teams and senior stakeholders.
• Identify and exploit vulnerabilities across operating systems, networks, applications, and protocols.

Skills

Web penetration testing

Infrastructure penetration testing

Communication skills

Tools

Python

Go

PowerShell

Job description

Role: Penetration Tester

Duration: 12 month Contract

Pay: Up to £500 per day (Outside IR35)

Location: Fully Remote

Excellent long term contract for an experienced Penetration Tester to support a large-scale international security programme, delivering high-quality offensive security assessments across applications, infrastructure, and networks.

You’ll be joining a specialist team responsible for delivering structured penetration tests, vulnerability assessments and security design reviews. Working within a defined AGILE sprint model, you will plan, execute and report on testing activities, producing clear technical findings, risk assessments and remediation guidance. Strong communication skills are essential, as you’ll deliver briefs to both technical teams and senior stakeholders.

The role requires hands‑on experience with modern penetration testing tools and recognised methodologies, along with the ability to identify and exploit vulnerabilities across operating systems, networks, applications, and protocols. A background in scripting (Python, Go, PowerShell, or shell) is highly desirable.

Key Requirements

• Strong experience in web and infrastructure penetration testing
• Proficiency with offensive security tooling and methodologies
• Ability to produce clear, structured, executive‑level reporting
• Knowledge across network security, application security, cryptography and authentication
• SC / NATO SECRET security clearance (or eligibility to obtain)
• Relevant certifications (OSCP, OSCE, OSWE, GPEN, CREST) beneficial

This role offers the chance to contribute to a critical, high‑profile security initiative while enjoying full flexibility and Outside IR35 engagement.

If you’re an experienced Pen Tester looking for your next long‑term contract, I’d love to hear from you.

People Source Consulting Ltd is acting as an Employment Business in relation to this vacancy. People Source specialise in technology recruitment across niche markets including Information Technology, Digital TV, Digital Marketing, Project and Programme Management, SAP, Digital and Consumer Electronics, Air Traffic Management, Management Consultancy, Business Intelligence, Manufacturing, Telecoms, Public Sector, Healthcare, Finance and Oil & Gas.