Penetration Tester

JR United Kingdom; Colchester; Remote; GBP 40,000 - 70,000; Full time

Job summary

A leading cybersecurity consulting firm is seeking a Penetration Tester to conduct thorough security tests across various environments. This remote-friendly position offers the chance to contribute to high-profile security assessments, collaborate with diverse clients, and grow within an expert team dedicated to quality and excellence in cybersecurity.

Qualifications

• Minimum 2 years experience in penetration testing.
• Hold OSCP, CRT, or CCT-INF certifications.
• Solid understanding of attack techniques (e.g., OWASP Top 10).

Responsibilities

• Conduct thorough penetration tests on various environments.
• Deliver detailed, client-ready reports with findings and advice.
• Collaborate directly with clients during tests and presentations.

Skills

Penetration Testing

Threat Simulation

Red Teaming

Scripting

Communication

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)