Senior Security Specialist – Penetration Testing

LSEG is seeking a Senior Penetration Tester to join our internal offensive security team. This role is hands-on and deeply technical, responsible for planning and executing penetration tests across a wide range of systems and applications. The successful candidate will be a skilled offensive security professional with a passion for uncovering vulnerabilities and improving security posture through rigorous testing and collaboration. Key Responsibilities Conduct in-depth penetration tests on applications, infrastructure, and cloud environments. Take full ownership of assigned pentesting engagements end-to-end and deliver with limited oversight. Compile technical scoping documents, track and document assessment metadata Engagement details(who, what, when, where) Testing team members and roles Tools and methodologies used Schedule and timelines Target systems and environments Constraint Senior Security Specialist – Penetration Testing s, exclusions, and limitations Testing activities and event logs Document findings clearly and concisely, providing actionable remediation guidance. Collaborate with application teams to scope, execute, and report on security assessments. Contribute to team improvement efforts and ensure all initiatives and feedback are well documented for future references. Contribute to the continuousimprovement of testing methodologies, tooling, automation. Stay current with emerging threats, vulnerabilities, and offensive security techniques. Participate in R&am