Security Consultant - CHECK Team Leader

ProCheckUp (PCU); England; On-site; GBP 50,000 - 70,000; Full time

Job summary

A cybersecurity firm in the United Kingdom is seeking a Senior Penetration Tester to lead engagements and mentor team members. The ideal candidate will have CREST CCT certification and experience with both public and private sector clients. Responsibilities include executing penetration tests and developing team capabilities. Strong skills in Windows, Linux environments, and cloud platforms are essential for success in this role.

Qualifications

• Minimum two years’ experience as a CHECK Team Leader.
• Three years’ professional penetration testing experience.
• Proven expertise in hybrid environments.

Responsibilities

• Lead and execute penetration testing assignments.
• Supervise and mentor CHECK Team Members.
• Develop and review tactics for red team campaigns.

Skills

Assessing Windows environments

Assessing Linux environments

Knowledge of cloud environments (AWS, Azure)

Understanding of OWASP

MITRE ATT&CK knowledge

Client-facing skills

Technical documentation skills

Education

CREST CCT (App/Infra) certification

Chartered Cyber Security Professional title

Job description

This is a senior technical role leading penetration testing engagements, mentoring team members, and driving excellence in offensive cyber capabilities.

Responsibilities

• Lead and execute infrastructure and application penetration testing assignments for public sector and private clients.
• Supervise and mentor CHECK Team Members, ensuring high standards in reporting, methodology, and client communication.
• Develop, implement and review tactics, techniques, and procedures for red team and social engineering campaigns.
• Engage in regular knowledge transfer and technical development within the team.
• Maintain compliance with latest NCSC and UK Cyber Security Council requirements for CHECK Team Leaders.

Qualifications

• Hold a valid CREST CCT (App/Infra) or CyberScheme CHECK Team Leader (CTL-INF/APP) certification.
• Achieved the Principal or Chartered Cyber Security Professional title (UK Cyber Security Council – Security Testing specialism).
• Minimum two years’ experience as a CHECK Team Leader and three years’ professional penetration testing experience.

Required Skills

• Proven expertise in assessing Windows, Linux, cloud (AWS, Azure), and hybrid environments.
• Strong understanding of OWASP, MITRE ATT&CK, and red team methodologies.
• Excellent communication, technical documentation, and client-facing skills.

Preferred Skills

• Experience running red team, purple teaming exercises and developing engagement-specific tooling.
• Familiarity with Technical Surveillance and Counter Measures (TSCM), mobile app testing (iOS/Android), cloud security testing AI Security testing.
• Proven track record leading complex, multi-stage cyber security assessments.

Seniority level: Mid-Senior level

Employment type: Full-time

Job function: Information Technology

Industries: Computer and Network Security