Senior Security Specialist – Penetration Testing
Core
Planning and executing end-to-end penetration tests across web applications, APIs, thick clients, and cloud-native infrastructures to uncover vulnerabilities and improve security posture.
Role type
Senior hands-on IC penetration tester
Builds
Security assessments and remediation guidance for LSEG's internal systems and applications
Domain
Financial markets infrastructure / Cybersecurity
Deliverable
production ML models | product features | dashboards & analysis | research | client delivery | infrastructure | physical/clinical work
Required skills
Penetration testing (Web Apps, APIs, Active Directory, Cloud), Cloud platforms (AWS, Azure, GCP), Containerization (Docker, Kubernetes), Custom scripting, Technical reporting, Risk assessment
Preferred skills
Threat modelling, Automation of pentesting tasks, R&D in offensive security techniques
Technologies
Burp Suite, Command-line tools, Docker, Kubernetes, AWS, Azure, GCP
Responsibilities
Conduct in-depth penetration tests on applications, infrastructure, and cloud environments; Take full ownership of assigned pentesting engagements end-to-end; Compile technical scoping documents and track assessment metadata; Document findings clearly and provide actionable remediation guidance; Collaborate with application teams to scope, execute, and report on security assessments; Develop and maintain custom tools, scripts, and exploits to support testing activities
Seniority
Senior, hands-on IC