CHECK Pen Tester , CSTM

BreachLock, Inc.; Remote; GBP 60,000 - 80,000; Full time

Job summary

A cybersecurity firm is seeking a CHECK-Certified Penetration Tester to join their remote team in the UK. The ideal candidate will perform thorough penetration tests across various environments, including infrastructure and applications. Responsibilities include delivering detailed reports and collaborating with security teams. To qualify, applicants must possess a valid CHECK certification and demonstrate hands-on experience in penetration testing. Strong communication skills are crucial for presenting findings to stakeholders.

Qualifications

• Must have valid CHECK certification.
• Strong experience in penetration testing for various environments.
• Excellent communication skills for reporting findings.

Responsibilities

• Deliver penetration tests across diverse environments.
• Conduct detailed testing and present actionable reports.
• Collaborate with security teams for validation engagements.

Skills

Network penetration testing

Application penetration testing

Cloud penetration testing

Proficiency in Python

Proficiency in Bash

Proficiency in PowerShell

Communication skills

Education

CHECK certification (e.g., CRT)

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.