Lead Penetration Tester (CHECK CTL) – Hybrid, Bristol

CBSbutler; West of England; Hybrid; GBP 80,000 - 100,000; Full time

Benefits offered by this job

Hybrid working

Company benefits package

Training & certification support

Career development opportunities

Job summary

CBSbutler is seeking an experienced Lead Penetration Tester / CHECK Team Leader (CTL) to join its Offensive Security team in Bristol on a hybrid model. You will own complex security engagements across Defence, Government and critical infrastructure, mentoring juniors and shaping service offerings.

You will lead testing across infrastructure, web apps, APIs, cloud and OT, while reporting findings and collaborating with clients to remediate risks.

Qualifications

• Current CREST CHECK Team Leader (CTL) qualification - essential.
• Strong hands-on penetration testing experience across infrastructure, applications, cloud or complex environments.
• Experience planning, leading and delivering penetration testing engagements.
• Excellent technical report writing and the ability to communicate findings to technical and non-technical audiences.
• Strong stakeholder management and client-facing consulting skills.
• Good understanding of cyber security frameworks, standards and best practices.
• Experience with scripting or automation using Python, PowerShell, Bash or similar.
• Strong analytical and problem-solving skills.
• Ability to obtain SC Security Clearance, potentially progressing to higher levels of clearance.

Responsibilities

• Lead and deliver penetration testing engagements across infrastructure, web apps, APIs, cloud, OT.
• Plan and scope testing engagements in line with CHECK standards and industry best practices.
• Provide technical leadership and QA across penetration testing activities.
• Produce detailed technical and executive reports with vulnerabilities and remediation.
• Collaborate with customers and stakeholders to meet security requirements.
• Mentor junior testers and CHECK Team Members.
• Contribute to development of methodologies, tooling and services.
• Stay updated on threats and attack techniques.

Skills

CTL qualification

Penetration testing

Leadership

Report writing

Stakeholder management

Security frameworks

Scripting (Python/PowerShell/Bash)

Analytical thinking

Security clearance

Job description

CBSbutler is seeking an experienced Lead Penetration Tester / CHECK Team Leader (CTL) to join its Offensive Security team in Bristol on a hybrid model. You will own complex security engagements across Defence, Government and critical infrastructure, mentoring juniors and shaping service offerings.

You will lead testing across infrastructure, web apps, APIs, cloud and OT, while reporting findings and collaborating with clients to remediate risks.