Senior Cybersecurity Consultant (Penetration Tester)

A premier UK consultancy is seeking a skilled and passionate Penetration Tester to join its growing team of cybersecurity experts. This is a dynamic opportunity for individuals with strong technical skills and a proactive mindset, eager to make a tangible impact across a wide range of client environments.

Working on mission critical projects across National Security, Critical National Infrastructure and Defence the Senior Penetration Tester will liaise with highly-skilled teams acting as a trusted advisor.

Key Responsibilities:

• Conduct hands-on internal penetration tests in infrastructure/Active Directory environments
• Produce clear and concise technical reports, summarising findings for both technical and business stakeholders
• Work directly with clients as a trusted advisor – this is a consulting-facing role
• Operate in sensitive, high-risk environments where mistakes have real consequences
• Contribute to improving team tooling, processes, and client methodology
• Be comfortable working autonomously without extensive documentation or runbooks

Key Qualifications and Skills:

Candidates who meet the following criteria are strongly encouraged to apply – and even if every box isn’t ticked, applications are welcome, as related opportunities may also be available:

• Possesses industry-recognised certifications such as CTM, CSTM, CTL, CSTL, OSCP, or CREST/Cyber Scheme qualifications.
• Brings specialist knowledge in one or more areas of penetration testing – this could include mobile app security, cloud environments, operational technology (OT), or specific sectors such as telecommunications, defence, or maritime.
• Demonstrates a strong desire to contribute to the growth of the team – whether by supporting internal training initiatives, enhancing infrastructure and tooling, or helping plan and execute client engagements.
• Keen to deliver and evolve high-quality ethical hacking training as part of a CREST-accredited programme.
• Thrives in problem-solving environments, with excellent analytical skills and a curiosity-driven mindset.
• Enjoys working collaboratively with diverse stakeholders, bringing adaptability and energy to a fast-paced consulting environment.