Penetration Tester - OpenSourced Ltd : Job Details

Penetration Tester - UK (Remote)

Join a fast-growing cyber security team and help defend businesses against real-world threats.

Are you passionate about cyber security and ready to take on the challenge of protecting critical systems from cyber attacks? We're working with a trusted and innovative cyber security provider looking to expand their expert Penetration Testing team. This is your opportunity to join a forward-thinking, people-first organisation where your skills will directly contribute to securing modern businesses.

The Role

As a Penetration Tester, you’ll deliver comprehensive application and infrastructure assessments, create detailed technical reports, and advise clients on remediation actions. You’ll be deeply involved in client engagements, from scoping and proposals to final delivery. You’ll also collaborate on internal research, helping the team stay ahead of evolving threats.

What You’ll Be Doing

• Conduct application, infrastructure, and other penetration testing engagements
• Deliver high-quality reports with clear technical and non-technical findings
• Perform vulnerability assessments and suggest actionable remediation
• Participate in scoping calls and draft client proposals
• Manage project timelines and client deliverables
• Contribute to quality assurance processes
• Stay on the cutting edge of new threats, tools, and vulnerabilities

What We’re Looking For

• Proven experience in application and infrastructure testing (Windows/Linux/AD)
• Strong understanding of OWASP, PTES, and similar methodologies
• Comfortable with social engineering (phishing, vishing)
• Scripting or programming skills in a preferred language
• Solid knowledge of networks, operating systems, and virtualized environments
• Relevant degree and security certifications (OSCP, CEH, GPEN or similar)

Bonus Skills (Nice to Have)

• Experience with cloud environments (AWS, Azure)
• Mobile app testing (iOS/Android)
• IoT/hardware security assessments

Personal Attributes

• Excellent communication and reporting skills
• Passion for cyber security and continuous learning
• Analytical thinker with a problem-solving mindset
• Ability to work independently and collaboratively
• Strong relationship-building and stakeholder engagement skills

What’s in It for You

• 25 days annual leave + 8 public holidays
• Your birthday off—every year!
• Private healthcare
• Company pension/401k contribution
• Subsidized gym membership
• Ongoing learning allowance
• Flexible working policy
• Regular team events and social activities

This is more than just a job—it’s a chance to help shape the security landscape and grow within a vibrant, supportive team.

Apply today to learn more or speak confidentially with one of our specialist cyber consultants.