CHECK Team Leader – Infrastructure

UBDS

. Lead and deliver infrastructure penetration testing engagements in accordance with NCSC CHECK requirements and recognised industry methodologies .

Posted 11/11/2026full-timeLondon • United KingdomSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in leading infrastructure penetration testing engagements, with a strong focus on vulnerability assessment, technical reporting, and stakeholder communication. Proficient in utilizing industry-standard tools and methodologies to identify and remediate security risks across diverse environments.

Highest-signal resume keywords

NCSC CHECK Team Leader StatusInfrastructure Penetration TestingNetwork Security AssessmentsTechnical Reporting SkillsExperience with Penetration Testing Tools

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Infrastructure Penetration TestingVulnerability IdentificationNetwork Security AssessmentActive Directory Security AssessmentCloud Infrastructure Security TestingPython ScriptingPowerShell ScriptingBash ScriptingExploit DevelopmentNetwork Protocols Understanding

Soft Skills

Analytical SkillsProblem-Solving SkillsCommunication SkillsMentoring SkillsTechnical Leadership

Tools & Technologies

Burp SuiteNmapNessusMetasploitMicrosoft AzureAWS

Certifications & Qualifications

NCSC CHECK Team LeaderCREST CertificationOffSec CertificationGIAC Certification

Industry Keywords

Cyber SecurityRegulated EnvironmentsUK GovernmentDefenceCREST Methodologies

Tech Stack

Tools & technologies

AWSAzureCloudCyber SecurityFirewallsLinuxPythonSwitching

About the role

Key responsibilities & impact

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 technical scoping, planning and delivery of penetration testing engagements
Identify, analyse and document vulnerabilities, attack paths and associated risks
Produce technical reports with findings, risk ratings and actionable remediation recommendations
Present findings to customers and translate technical vulnerabilities into 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 with customers, security teams and internal stakeholders to ensure successful engagement delivery
Contribute to the development of UBDS's penetration testing and wider cyber security capabilities

Requirements

What you’ll need

Current NCSC CHECK Team Leader status for Infrastructure Penetration Testing is essential
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 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
Relevant recognised technical qualifications supporting CHECK Team Leader status
Penetration testing experience in UK Government, Defence or other regulated environments is beneficial
Experience with Active Directory security assessments and internal network attack-path analysis is beneficial
Experience with Microsoft Azure and/or AWS cloud infrastructure security testing is beneficial
Experience with hybrid infrastructure and identity security assessments is beneficial
Red Team engagement and adversary simulation experience is beneficial
Wireless network security assessment experience is beneficial
Infrastructure vulnerability research and exploit development experience is beneficial
Python, PowerShell or Bash scripting experience for security testing and automation is beneficial
Experience with Burp Suite, Nmap, Nessus, Metasploit or equivalent is beneficial
Experience contributing to penetration testing methodologies, technical quality assurance and peer review is beneficial
Knowledge of NCSC guidance, CREST methodologies and wider security testing standards is beneficial
Additional CREST, OffSec, GIAC or equivalent penetration testing certifications are advantageous

Benefits

Comp & perks

Training and personal development options covering technical skills, business acumen and methodologies
Mentorship and opportunities to gain certifications
Private medical cover for employee and spouse/partner via Vitality
Discretionary bonus based on personal and company performance
25 days holiday plus 1 birthday day and 1 work anniversary day, in addition to UK bank holidays
Electric Vehicle leasing with salary sacrifice
Contributed Pension Scheme
Death in service cover
Opportunities to work on cutting-edge projects across diverse industries
Collaborative, innovation-focused environment
Opportunities to contribute ideas and solutions with tangible client and company impact