Principal Penetration Tester

JR United Kingdom; Guildford; On-site; GBP 70,000 - 100,000; Full time

Job summary

A leading cyber security consultancy in the UK seeks a Principal Penetration Tester to drive high-impact security assessments and mentoring of junior testers. You will lead advanced engagements across diverse environments, providing expert guidance and maintaining edge against emerging threats. Join a high-performance security team at the forefront of the industry.

Qualifications

• Extensive experience in penetration testing, red teaming, and security consulting.
• Strong knowledge of attack techniques and exploit development.
• Proven ability to lead high-impact security engagements.

Responsibilities

• Lead advanced penetration testing engagements.
• Oversee red teaming exercises for adversary simulation.
• Mentor junior testers and enhance team performance.

Skills

Penetration Testing

Red Teaming

Threat Modelling

Exploit Development

Education

CREST CRT/CCS

OSCP

OSEP

CISSP

Job description

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Our client, a leading cyber security consultancy, is looking for a Principal Penetration Tester to lead and execute complex security assessments and play a key strategic role, driving high-impact penetration testing, red teaming, and security advisory services for clients across various industries.

Main Responsibilities:

• Lead advanced penetration testing engagements across networks, applications, cloud, and mobile environments.
• Oversee red teaming exercises, delivering real-world adversary simulation insights.
• Provide expert security guidance, working with stakeholders to enhance security posture.
• Mentor and develop junior testers, fostering a high-performance security team.
• Stay ahead of emerging threats, exploits, and attack methodologies to improve testing capabilities.

To be considered:

• Extensive experience in penetration testing, red teaming, and security consulting.
• Strong knowledge of attack techniques, threat modelling, and exploit development.
• Certifications such as CREST CRT/CCS, OSCP, OSEP, or CISSP are highly desirable.
• Proven ability to lead and deliver high-impact security engagements.