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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # CHECK Team Leader - Infrastructure (CTL) - **Company:** UBDS Group - **Location:** Manchester, United Kingdom - **Experience:** Expert - **Salary:** £47,650 - **Contract:** Permanent contract - **Skills:** Private Networks, Microsoft Windows, Active Directory, Amazon Web Services, Software System Penetration Testing, Authentication Protocols, Microsoft Azure, Bash Shell, Burp Suite, Cloud Computing Security, Cyber Security, Linux, Python (Programming Language), Network Security, Network Architecture, Routing, Network Segmentation, Network Protocols, Nmap, Windows PowerShell, Cloud Services, Red Team (Cyber Security), Wireless Networks, Metasploit, Nessus, Vulnerability Analysis - **Published:** November 10, 2026 - **Apply:** https://www.adzuna.co.uk/jobs/details/5960049590 ## About the Role * Strong hands-on experience delivering infrastructure penetration testing engagements. * Experience leading technical penetration testing engagements and working directly with customers. * Strong understanding of network infrastructure, operating systems and enterprise security. * Experience testing Windows, Linux, Active Directory and network-based services. * Strong knowledge of common infrastructure vulnerabilities, attack techniques and exploitation methods. * Experience with internal and external network penetration testing. * Understanding of networking protocols, routing, switching, firewalls and network security. * Experience using industry-standard penetration testing tools and frameworks. * Strong technical reporting skills, including clear documentation of vulnerabilities, risks and remediation recommendations. * Ability to communicate complex technical findings to technical and non-technical stakeholders. * Experience supporting or mentoring other penetration testers. * Strong analytical, problem-solving and technical troubleshooting skills. * Ability to manage engagements independently while maintaining high standards of technical delivery. Experience across some of the following would be beneficial: * Penetration testing within UK Government, Defence or other regulated environments. * Active Directory security assessments and internal network attack-path analysis. * Cloud infrastructure security testing across Microsoft Azure and/or AWS. * Hybrid infrastructure and identity security assessments. * Red Team engagements and adversary simulation. * Wireless network security assessments. * Infrastructure vulnerability research and exploit development. * Python, PowerShell or Bash scripting for security testing and automation. * Experience with security testing tools such as Burp Suite, Nmap, Nessus, Metasploit or equivalent. * Experience contributing to penetration testing methodologies, technical quality assurance and peer review. * Knowledge of NCSC guidance, CREST methodologies and wider security testing standards. * Current NCSC CHECK Team Leader status for Infrastructure Penetration Testing is essential. * Relevant recognised technical qualifications supporting CHECK Team Leader status. * Additional CREST, OffSec, GIAC or equivalent penetration testing certifications would be advantageous. This role would suit an experienced infrastructure penetration tester who enjoys combining hands-on technical security testing with engagement leadership and customer consultancy. You'll work across a broad range of complex customer environments, delivering meaningful security assessments and helping organisations understand and address their security risks. ## Description You will lead technical engagements, identify security vulnerabilities, assess potential business impact and provide practical remediation guidance. You'll also support the development of our security testing capability, working alongside experienced penetration testers, cyber security consultants and wider technical teams. * Lead and deliver infrastructure penetration testing engagements in accordance with NCSC CHECK requirements and recognised industry methodologies. * Conduct internal and external infrastructure penetration tests across enterprise networks, systems and services. * Assess Windows, Linux, Active Directory and associated enterprise infrastructure for security vulnerabilities and weaknesses. * Perform network security assessments, including vulnerability identification, exploitation and validation. * Assess network segmentation, authentication mechanisms, access controls and infrastructure security configurations. * Conduct security testing across cloud and hybrid infrastructure environments where appropriate. * Lead the technical scoping, planning and delivery of penetration testing engagements. * Identify, analyse and clearly document vulnerabilities, attack paths and associated risks. * Produce high-quality technical reports with clear findings, risk ratings and actionable remediation recommendations. * Present findings to customers, translating technical vulnerabilities into meaningful business and security risks. * Provide technical leadership, guidance and quality assurance to other penetration testers. * Support the development and improvement of testing methodologies, tooling and reporting standards. * Work closely with customers, security teams and internal stakeholders to ensure successful engagement delivery. * Contribute to the ongoing development of UBDS's penetration testing and wider cyber security capabilities., At UBDS Group our mission is to support entrepreneurs who are setting new standards with technology solutions across cloud services, cybersecurity, data and AI, ensuring that every investment advances our commitment to innovation, making a difference, and creating impactful solutions for organisations and society.