Lead Penetration Tester | CREST CHECK Team Leader

CBSbutler; England; On-site; GBP 85,000 - 100,000; Full time

Job summary

You will own engagements, mentor testers, and shape the growth of the Offensive Security capability while ensuring high-quality reports and actionable remediation guidance.

Qualifications

• Proven track record leading penetration testing engagements across complex environments.
• Experience with infrastructure, web apps, APIs, cloud, OT/ICS or wireless testing.
• Strong written risk communication and reporting skills.
• Ability to plan, scope, and quality assure engagements.
• Excellent client facing consulting and stakeholder management.
• Scripting experience (Python/PowerShell/Bash) or similar.
• Certified in OWASP/CREST or equivalent like OSCP/OSWE/OSRP.

Responsibilities

• Lead and deliver penetration testing engagements across multiple domains.
• Plan, scoping and manage engagements per CHECK requirements.
• Provide technical leadership and SME guidance on engagements.
• Quality assure findings, reports and testing outputs.
• Translate vulnerabilities into business risk and remediation steps.
• Mentor junior testers and CHECK Team Members.
• Help develop testing methodologies, tools and services.
• Engage with customers and senior stakeholders throughout the lifecycle.

Skills

Penetration testing leadership

CHECK Team leadership

Infrastructure pentest

Web apps pentest

APIs pentest

Cloud security testing

Python/PowerShell

Technical report writing

Client/stakeholder management

Security clearance

Tools

Security frameworks

MITRE ATT&CK

NCSC CAF/NIST/ISO27001

Job description

You will own engagements, mentor testers, and shape the growth of the Offensive Security capability while ensuring high-quality reports and actionable remediation guidance.