Penetration Tester

Penetration Tester – UK Remote Linux / Windows Python, PowerShell, Bash

Are you passionate about ethical hacking and ready to take your skills to the next level?

We're hiring a Penetration Tester to join a growing cyber team delivering CREST-aligned security services. You’ll simulate real-world attacks, uncover vulnerabilities, and help clients strengthen their defenses — all while working with cutting-edge tools and frameworks.

What You’ll Do:

Perform web, infrastructure, wireless & cloud penetration tests (OWASP, PTES).
Scope engagements and define testing objectives with clients.
Identify, exploit, and report vulnerabilities with clarity and precision.
Provide actionable remediation advice.
Stay ahead of emerging threats and tools.

What You’ll Bring:

Experience in penetration testing across multiple domains.
Working at a cyber team consulting team delivering CREST-aligned security services
Strong knowledge of OWASP Top 10, PTES, MITRE ATT&CK.
Proficiency in Linux/Windows and scripting (Python, PowerShell, Bash).
Excellent communication and reporting skills.

Certifications:
? CREST CPSA or CRT, OSCP (essential)
? OSEP, OSWE, GWAPT, GPEN, CHECK (desirable)

Why Join?

Diverse, challenging projects
Career development aligned with SFIA Level 5
Supportive, collaborative team culture

Interested or know someone who might be? Let’s connect!

All our roles are UK based. When submitting your application to Colossus, please ensure the following

Your CV has your address and postcode.
You also have your correct phone number and email address so we can contact you asap regarding your application.
For confidentiality purposes, please remove any reference contact phone number's and email address details from your CV.