Penetration Tester

Lorien; United Kingdom; Remote; GBP 45,000 - 70,000; Full time

Job summary

A leading cybersecurity firm is seeking a skilled Penetration Tester for a fully remote role based in mainland UK. This position involves conducting ethical hacking and security testing to identify vulnerabilities in a variety of systems and infrastructure, while also focusing on personal development and continuous training.

Benefits

Flexible, fully remote working environment

Training and certification support

25 days annual leave + UK bank holidays

Qualifications

• Must have experience conducting penetration tests (web, infrastructure).
• Strong knowledge of OWASP, NIST frameworks required.
• Must reside in mainland UK and be eligible for UK security clearance.

Responsibilities

• Plan and perform penetration tests on networks and applications.
• Deliver technical and executive reports to clients.
• Collaborate with internal teams to ensure compliance.

Skills

Security testing methodologies

Communication skills

Penetration testing

Education

CPSA, CRT or CCTIM Certification

Tools

Burp Suite

Nmap

Metasploit

Kali Linux

Job description

Penetration Tester – Remote

About the Role

Lorien are seeking a talented and motivated Penetration Tester to join our clients growing cyber security team on a fully remote basis (mainland UK only).

You will be responsible for conducting ethical hacking and security testing engagements to identify vulnerabilities in client systems, applications, and infrastructure.

This is an exciting opportunity to work across a range of industries while further developing your skills in a supportive and professional environment.

Key Responsibilities

• Plan and perform penetration tests on networks, web applications, APIs, cloud environments, and other systems.
• Deliver clear, actionable technical and executive reports to clients.
• Collaborate with internal teams to ensure quality and compliance with best practices.
• Stay up to date with the latest vulnerabilities, attack techniques, and tools.
• Work within project deadlines and maintain clear communication with stakeholders.
• Maintain confidentiality and adhere to client security policies.

Essential Requirements

• CPSA, CRT or CCTIM Certified
• Must be currently residing in mainland UK.
• Eligible for UK security clearance (must have been a UK resident for at least 5 years).
• Experience conducting penetration tests (web, infrastructure, external/internal).
• Strong knowledge of security testing methodologies and frameworks (eg, OWASP, NIST).
• Proficiency with industry–standard tools (eg, Burp Suite, Nmap, Metasploit, Kali Linux).
• Excellent written and verbal communication skills.

Desirable Skills

• OSCP, OSWE, or other relevant certifications.
• Experience with red teaming or threat simulation exercises.
• Familiarity with secure coding practices and code review.
• Scripting experience (eg, Python, Bash, PowerShell).
• Exposure to cloud platforms (AWS, Azure, GCP) and associated security testing.

Benefits

• Flexible, fully remote working environment.
• Training and certification support – 30 days per year dedicated to personal development
• 25 days annual leave + UK bank holidays.
• Opportunity to work on varied and interesting engagements across sectors.

Carbon60, Lorien & SRG – The Impellam Group STEM Portfolio are acting as an Employment Business in relation to this vacancy.