Senior Penetration Tester in London

Senior Penetration Tester Salary: £60,000 – £65,000
Location: Remote
Security Clearance: SC Cleared
About the Role We are looking for an experienced Senior Penetration Tester to join our growing cyber security team. This is an excellent opportunity for a technically strong security professional looking to work across a varied portfolio of complex environments and challenging penetration testing engagements.
You will be involved in delivering hands-on penetration testing and security assessments for clients across public sector, Critical National Infrastructure (CNI) and large enterprise environments, with exposure to infrastructure, applications, cloud and modern containerised technologies.
Key Responsibilities Deliver manual penetration testing and security assessments across infrastructure, networks, operating systems, web applications and APIs
Conduct security testing across Azure, AWS and other cloud environments
Assess Kubernetes, Docker, IAM and CI/CD environments
Perform internal and external infrastructure penetration tests
Identify, exploit and clearly document security vulnerabilities
Produce high-quality technical reports and present findings to clients and stakeholders
Work closely with clients to understand their environments and communicate technical risks effectively
Contribute to security architecture and security control reviews
Support junior consultants through mentoring, knowledge sharing and technical guidance
Keep up to date with emerging vulnerabilities, attack techniques and industry developments
Contribute to the ongoing development of penetration testing methodologies, tooling and service offerings
Essential Experience Proven commercial experience in penetration testing / offensive security
Strong hands-on experience across infrastructure and/or application penetration testing
Experience working with cloud environments , particularly Azure and/or AWS
Experience with modern technologies such as Kubernetes, Docker, APIs and CI/CD
Strong understanding of current attack techniques, vulnerabilities and defensive controls
Excellent report writing and client-facing communication skills
Current UK Security Clearance (SC)
Desirable CREST or Cyber Scheme certifications
Experience working within Public Sector, CNI or large enterprise environments
Experience leading penetration testing engagements or supporting/mentoring junior testers
Experience with cloud-native and hybrid environments
Cyber Security Council professional registration