Penetration Tester

JR United Kingdom; Hounslow; On-site; GBP 40,000 - 65,000; Full time

Job summary

A leading cybersecurity consultancy is seeking an experienced Penetration Tester to join their dynamic team. In this role, you will conduct comprehensive security tests across various platforms, deliver detailed reports, and work closely with clients to address vulnerabilities. If you possess relevant certifications and have a solid background in penetration testing, this is an exciting opportunity for career growth in a flexible work environment.

Qualifications

• Minimum 2 years experience in penetration testing required.
• Hold at least one relevant certification like OSCP.
• Experience in a client-facing consultancy role preferred.

Responsibilities

• Conduct penetration tests on various environments.
• Deliver detailed client-ready reports with practical advice.
• Collaborate with stakeholders during testing phases.

Skills

Penetration Testing

Scripting/Automation

Communication

Reporting

Education

OSCP

CRT

CCT-INF

Tools

Burp Suite

Nmap

Metasploit

Job description

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Travel: Occasional travel to client sites or company events

Our client is a respected and rapidly growing leader in the cybersecurity and risk consulting space. Working with a wide range of organizations — from FTSE 100 companies to critical infrastructure and government entities — they provide high-quality security testing and advisory services across various industries.

This is an excellent opportunity to join a team that values your expertise, supports your growth, and offers the flexibility of remote working with the stimulation of varied engagements.

Key Responsibilities:

• Conduct thorough penetration tests on infrastructure, networks, cloud environments, and web applications.
• Deliver high-quality, client-ready reports detailing findings, impact, and practical remediation advice.
• Collaborate directly with client stakeholders during scoping, testing, and results presentations.
• Keep current with emerging threats, vulnerabilities, and tools in the offensive security landscape.
• Contribute to internal development of testing methodologies, tooling, and knowledge sharing.
• Experience with red teaming, threat simulation, or assumed breach testing.
• Scripting/automation with Python, Bash, or PowerShell.
• Previous consultancy or client-facing experience.
• Eligibility for or possession of UK Security Clearance (preferred but not required).
• Solid understanding of common attack techniques and vulnerability classes (e.g., OWASP Top 10, MITRE ATT&CK).
• Strong familiarity with tools such as Burp Suite, Nmap, Metasploit, etc.
• Excellent communication and reporting skills.

Required Qualifications:

• Demonstrable experience in penetration testing (minimum 2 years preferred).
• Hold at least one of the following certifications:
• OSCP (Offensive Security Certified Professional)
• CRT (CREST Registered Tester)
• CCT-INF (CREST Certified Infrastructure Tester)