Check Team Leader

iO Associates; England; Remote; GBP 80,000; Full time

Job summary

A cybersecurity solutions provider is seeking a certified CHECK Team Leader to lead high-impact security testing in the UK. In this key role, you will mentor junior testers and oversee penetration tests across enterprise and cloud environments. Ideal candidates will have relevant certifications and extensive experience in penetration testing. This position offers competitive compensation up to £80,000 and the flexibility of remote work with occasional travel.

Qualifications

• CHECK Team Leader certification is mandatory.
• Minimum 2 years as a CHECK Team Leader.
• 3 years of experience in penetration testing required.

Responsibilities

• Lead infrastructure and cloud penetration tests.
• Mentor and support junior team members.
• Deliver clear, risk-focused technical reports.

Skills

CHECK Team Leader certification (CTL-INF - Cyber Scheme or CREST)

2+ years as a CTL

3+ years of penetration testing experience

Strong knowledge of Active Directory

Proficiency with tools like Burp Suite, Nmap, Metasploit

Excellent written and verbal communication skills

Tools

Burp Suite

Nmap

Metasploit

Impacket

Job description

Overview

CHECK Team Leader - Up to £80,000 (Remote with occasional travel to client sites)

We're seeking a certified CHECK Team Leader to lead high-impact security testing across enterprise and cloud environments. This is a key role for an experienced professional ready to take ownership of critical engagements and mentor junior testers.

Key Responsibilities

• Lead infrastructure and cloud penetration tests (AWS, Azure, AD, Kubernetes).
• Mentor and support junior team members.
• Deliver clear, risk-focused technical reports.
• Support red teaming, adversary emulation, and R&D activities.
• Contribute to tooling and service development.

Required Skills & Experience

• CHECK Team Leader certification (CTL-INF - Cyber Scheme or CREST).
• 2+ years as a CTL and 3+ years of penetration testing experience.
• Strong knowledge of Active Directory, infrastructure, and cloud security.
• Proficiency with tools like Burp Suite, Nmap, Metasploit, and Impacket.
• Excellent written and verbal communication skills.

Desirable

• Certifications: OSCP, OSEP, CRTO.
• Scripting with Python, Bash, or PowerShell.
• Experience in red or purple teaming.

Other Requirements

• UK residency for the past 5 years.
• Must be Eligible for SC/DV clearance.
• Full UK driving licence.
• Willingness to travel for client engagements within the UK.

A fantastic opportunity for a skilled penetration tester to step into a senior leadership role. Apply now to help defend the UK's critical systems.