CHECK Team Lead

iO Associates; England; Remote; GBP 60,000 - 80,000; Full time

Job summary

A leading cybersecurity firm is seeking a CHECK Team Leader to oversee high-impact security testing across enterprise and cloud environments. This senior role involves mentoring junior testers, leading penetration tests, and contributing to service development, making it an excellent opportunity for experienced penetration testers looking to step into leadership.

Qualifications

• 2+ years as a CHECK Team Leader and 3+ years of penetration testing experience.
• Strong knowledge of security testing across enterprise and cloud environments.
• Proficiency in scripting with Python, Bash, or PowerShell is a plus.

Responsibilities

• Lead infrastructure and cloud penetration tests (AWS, Azure, AD, Kubernetes).
• Mentor junior team members and deliver risk-focused technical reports.
• Support red teaming, adversary emulation, and contribute to tooling development.

Skills

Active Directory

Infrastructure security

Cloud security

Communication

Education

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

OSCP, OSEP, CRTO certifications (desirable)

Tools

Burp Suite

Nmap

Metasploit

Impacket

Job description

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.