CHECK Pen Tester , CSTM

BreachLock, Inc.; Remote; GBP 50,000 - 70,000; Full time

Job summary

A leading global cybersecurity firm is seeking a CHECK-Certified Penetration Tester to join their UK team. This remote position involves delivering high-quality penetration tests across infrastructure and applications, supporting security validation engagements, and presenting findings to stakeholders. The ideal candidate must hold a valid CHECK certification and possess strong experience in penetration testing. Join a fast-paced environment that emphasizes growth and innovation in cybersecurity solutions.

Benefits

Flexible working

Opportunity for growth

Work on cutting-edge technologies

Qualifications

• You must have the legal right to work in the United Kingdom and reside in the UK.
• Strong hands-on experience in penetration testing across various environments.
• Solid understanding of modern attack paths and exploitation techniques.

Responsibilities

• Deliver CHECK-approved penetration tests across various environments.
• Perform manual, high-depth testing and advanced exploitation.
• Produce clear, actionable reports and present findings.

Skills

Network penetration testing

Application penetration testing

Cloud penetration testing

Scripting languages (Python, Bash, PowerShell)

Communication skills

Education

CHECK certification (e.g., CRT or equivalent)

Job description

CHECK-Certified Penetration Tester – UK (Remote) | BreachLock

BreachLock is a global leader in Continuous Attack Surface Discovery and Penetration Testing. Our AI-enhanced PTaaS and Adversarial Exposure Validation platforms deliver evidence-based risk insights for enterprises worldwide.

We are expanding our UK offensive security team and hiring a CHECK-certified Penetration Tester to support our growing portfolio of government and enterprise clients.

Eligibility Requirement (Important)

You must already have the legal right to work in the United Kingdom and be physically residing in the UK.

BreachLock cannot provide visa sponsorship for this role.

What You’ll Do

• Deliver CHECK-approved penetration tests across infrastructure, web applications, APIs, and cloud environments.
• Perform manual, high-depth testing and advanced exploitation aligned with industry standards (OWASP, NCSC, CREST).
• Support adversarial validation engagements, collaborating with internal and client security teams.
• Produce clear, actionable reports and present findings to technical and executive stakeholders.

What You Bring

• Valid CHECK certification (e.g., CRT or equivalent).
• Strong hands-on experience with network, application, and cloud penetration testing.
• Solid understanding of modern attack paths, exploitation techniques, and security controls.
• Proficiency with offensive tooling and scripting languages (Python, Bash, PowerShell).
• Excellent written and verbal communication skills.

Why BreachLock

• UK-remote role with flexible working, provided you reside in the UK.
• Work on cutting-edge PTaaS, CTEM, and AEV capabilities used by global enterprises and government clients.
• Fast-paced, high-impact environment with significant room for growth and specialization.
• Recognized by Gartner, GigaOm, and SANS as a global leader in automated and AI-powered offensive security.