CareerPlan

Senior Penetration Tester - CHECK Team Leader (CTL)

London, England, United KingdomFull-time2026-11-10 → 2026-11-13

Core

Lead and deliver infrastructure penetration testing engagements for Government, Defence, and regulated sectors, identifying vulnerabilities and providing remediation guidance.

Role type

Senior IC infrastructure penetration tester (Team Leader)

Builds

Security assessments and remediation guidance for enterprise networks, systems, and cloud/hybrid environments

Domain

Cyber security, infrastructure security, network security

Required skills

Infrastructure penetration testing, Windows/Linux/Active Directory assessment, network security assessment, vulnerability identification and exploitation, technical reporting, stakeholder communication, engagement leadership, security testing tooling

Preferred skills

UK Government/Defence environment experience, cloud infrastructure testing (Azure/AWS), Red Team engagements, scripting (Python/PowerShell/Bash), security tool expertise (Burp Suite/Nmap/Nessus/Metasploit), NCSC/CREST methodologies

Technologies

Windows, Linux, Active Directory, Microsoft Azure, AWS, Burp Suite, Nmap, Nessus, Metasploit, Python, PowerShell, Bash

Responsibilities

Lead technical scoping, planning, and delivery of penetration testing engagements; conduct internal and external infrastructure penetration tests; assess network segmentation, authentication, and access controls; identify and document vulnerabilities and attack paths; present findings to customers; provide technical leadership and QA to other testers; support development of testing methodologies and tooling

Seniority

Senior, hands-on IC with leadership responsibilities