Penetration Tester (OSCP)

Penetration Tester (OSCP)

Location: Remote

Position Type: Full-time

Reports to: Senior Penetration Tester

About the Organisation

A high-growth security consultancy working across government, space programmes, and FTSE 100 organisations is expanding its offensive security function. The team delivers complex, high-impact testing and simulation work for clients across the UK, US, and Europe. With a strong learning culture, excellent retention, and a track record of delivering cutting-edge work, this is an opportunity to develop quickly in a technically challenging environment.

Role Overview

We’re looking for a Penetration Tester / Red Team Consultant with 1–3 years’ experience who thrives on variety, problem-solving, and continuous learning. You’ll deliver offensive security assessments, red team operations, and threat-led simulations across a wide range of sectors, often on weekly, part-time client engagements.

The role is remote, with occasional client visits — though none have been required in the last five years.

Key Responsibilities

  • Deliver red team, purple team, and wider offensive security engagements.
  • Conduct attack simulations, threat modelling, and targeted technical testing.
  • Carry out occasional physical security assessments.
  • Produce high-quality penetration testing and red team reports.
  • Communicate findings clearly to both technical and non-technical stakeholders.
  • Support the development of offensive security services and internal methodologies.
  • Contribute to R&D on tools, techniques, and emerging threats.
  • Maintain a strong learning mindset and proactively grow technical capability.

Required Skills & Experience

  • 1–3 years’ experience in penetration testing, red teaming, or offensive security.
  • OSCP certification
  • Strong understanding of operating systems, networks, and application security.
  • Practical offensive security experience: exploitation, AD attacks, recon, tooling, etc.
  • Solid documentation and reporting skills.
  • Ability to articulate vulnerabilities, impact, and remediation confidently.
  • Desirable: exposure to ISO/IEC 42001 or experience as an auditor in AI governance.

What We Offer

  • Annual £5,000 development fund per person
  • Excellent retention, strong pay progression, and a supportive technical culture.
  • Work on government, defence, space, and major corporate engagements.
  • Remote-first working across UK/US/EU clients.
  • Standard hours: 9am–5pm, Monday–Friday.
  • 20 days holiday.
Company
4Square Recruitment Ltd
Location
London, South East, England, United Kingdom
Hybrid/Remote Options
Employment Type
Full-Time
Salary
£40,000 - £60,000 per annum
Posted
Company
4Square Recruitment Ltd
Location
London, South East, England, United Kingdom
Hybrid/Remote Options
Employment Type
Full-Time
Salary
£40,000 - £60,000 per annum
Posted