Senior Penetration Tester (RED TEAM)
Senior Penetration Tester (RED TEAM)

Senior Penetration Tester (RED TEAM)

Cheltenham Full-Time 48000 - 84000 £ / year (est.) No home office possible
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BreachLock is a global leader in Continuous Attack Surface Discovery and Penetration Testing. We provide enterprises with evidence-based risk across their entire attack surface to determine how they will respond to an attack. Our services include Attack Surface Management, Penetration Testing, and Red Teaming.

Join BreachLock’s elite offensive security team, where we don’t just simulate threats — we emulate real adversaries. As a Red Team Specialist, you will be at the frontlines of BreachLock’s offensive security operations, conducting advanced adversary emulation, bypassing modern defenses, and helping Fortune 500 clients improve their cyber resilience.

What You’ll Do:
  • Plan and execute full-scope red team engagements (TIBER-style, MITRE ATT&CK aligned)
  • Perform focused penetration tests on web applications, mobile apps (iOS/Android), APIs, and backend services, as well as traditional network/cloud infrastructure and specialised targets (IoT/OT) when required.
  • Simulate APTs using custom tooling and native techniques
  • Bypass EDR/XDR and evade detection controls
  • Work closely with Blue Teams for purple teaming and adversarial validation
  • Deliver executive reports and technical debriefs with precision
What You Bring:
  • 3+ years in red teaming or offensive security
  • Proficiency with C2 frameworks (Cobalt Strike, Sliver, Mythic)
  • Deep understanding of Windows/Linux internals, AD, and cloud (AWS/Azure)
  • Knowledge of OPSEC, evasive TTPs, and threat intelligence integration
  • Strong scripting skills (Python, PowerShell, Bash)
  • OSCP, CRTO, OSCE, or similar certs
  • Published exploits or open-source tools
Why BreachLock:
  • 100% remote-first culture
  • Cutting-edge work in PTaaS, AEV, and CTEM
  • Clients include global enterprises and governments
  • Fast-paced, growth-focused, no-BS environment
Why are we a Global Leader in Offensive Security:
  • Analyst Endorsements: Recognized again by Gartner, GigaOm, and SANS for advancing automated, AI-enhanced offensive security testing.
  • CTEM & AEV Leadership: Launched industry-first AI-powered CTEM and Adversarial Exposure Validation platforms, setting new benchmarks in exposure management.
  • GigaOm Leader (2025): Ranked as a Leader and Fast Mover for the second consecutive year in the GigaOm Radar for PTaaS and CTEM.
  • Media Spotlight: Featured in Reuters, Cybercrime Magazine, and SecurityWeek for driving measurable outcomes for Fortune 500 clients.

Senior Penetration Tester (RED TEAM) employer: BreachLock, Inc.

BreachLock is an exceptional employer for those seeking to make a significant impact in the field of offensive security. With a 100% remote-first culture, employees enjoy the flexibility to work from anywhere while engaging in cutting-edge projects that challenge their skills and foster professional growth. The company prioritises a fast-paced, growth-focused environment, offering opportunities to collaborate with global enterprises and governments, making it an ideal place for passionate individuals looking to advance their careers in cybersecurity.
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Contact Detail:

BreachLock, Inc. Recruiting Team

StudySmarter Expert Advice 🤫

We think this is how you could land Senior Penetration Tester (RED TEAM)

✨Tip Number 1

Network like a pro! Reach out to folks in the industry, attend meetups, and join online forums. The more connections we make, the better our chances of landing that dream role at BreachLock.

✨Tip Number 2

Show off your skills! Create a portfolio showcasing your penetration testing projects or any cool tools you've developed. This is a great way to demonstrate your expertise and passion for offensive security.

✨Tip Number 3

Prepare for interviews by brushing up on the latest trends in red teaming and offensive security. We should be ready to discuss real-world scenarios and how we would tackle them, especially using techniques aligned with MITRE ATT&CK.

✨Tip Number 4

Don’t forget to apply through our website! It’s the best way to ensure your application gets noticed. Plus, it shows you’re genuinely interested in joining our elite team at BreachLock.

We think you need these skills to ace Senior Penetration Tester (RED TEAM)

Red Teaming
Penetration Testing
Adversary Emulation
C2 Frameworks (Cobalt Strike, Sliver, Mythic)
Windows/Linux Internals
Active Directory (AD)
Cloud Security (AWS/Azure)
OPSEC
Evasive Tactics, Techniques, and Procedures (TTPs)
Threat Intelligence Integration
Scripting Skills (Python, PowerShell, Bash)
Technical Reporting
Collaboration with Blue Teams
Experience with APT Simulation

Some tips for your application 🫡

Tailor Your CV: Make sure your CV is tailored to the role of a Red Team Specialist. Highlight your experience in offensive security, especially any relevant projects or tools you've worked with. We want to see how your skills align with what we do at BreachLock!

Showcase Your Skills: Don’t just list your skills; demonstrate them! Include specific examples of how you've used C2 frameworks or conducted penetration tests. This helps us understand your hands-on experience and how you can contribute to our team.

Craft a Compelling Cover Letter: Your cover letter is your chance to shine! Use it to explain why you're passionate about offensive security and how you can help BreachLock stay ahead of threats. Keep it concise but impactful – we love a good story!

Apply Through Our Website: We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures you’re considered for the role. Plus, it shows you’re keen on joining our team!

How to prepare for a job interview at BreachLock, Inc.

✨Know Your Stuff

Make sure you brush up on your technical skills, especially around C2 frameworks and the MITRE ATT&CK framework. Be ready to discuss your experience with red teaming and penetration testing in detail, as well as any specific tools or techniques you've used.

✨Showcase Your Problem-Solving Skills

Prepare to talk about how you've tackled complex security challenges in the past. Use real-world examples to demonstrate your thought process and how you approach adversary emulation and bypassing defences.

✨Understand the Company’s Culture

Familiarise yourself with BreachLock's remote-first culture and their focus on cutting-edge offensive security. Show that you align with their values and can thrive in a fast-paced, growth-focused environment.

✨Prepare for Technical Debriefs

Since delivering executive reports and technical debriefs is part of the role, practice explaining complex concepts clearly and concisely. Think about how you would present your findings to both technical and non-technical stakeholders.

Senior Penetration Tester (RED TEAM)
BreachLock, Inc.
Location: Cheltenham
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