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 driving penetration tests across a wide range of systems and applications. The successful candidate will be a skilled offensive security qualified with a passion for uncovering vulnerabilities and improving security posture through thorough testing and teamwork.
Key Responsibilities
Conduct in-depth penetration tests on applications, infrastructure, and cloud environments.
Take full ownership of assigned penetration testing 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
Constraints, 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 continuous improvement of testing methodologies, tooling, automation.
Stay ahead of emerging threats, vulnerabilities, and offensive security techniques.
Participate in R&D; initiatives as guided from leadership.
Support educational sessions and mentoring within the team.
Develop and maintain custom tools, scripts, and exploits to support testing activities.
Required Skills & Experience
Validated hands-on experience in penetration testing of Web Applications, APIs, Thick Client and Common Infrastructures (Active Directory, Cloud and Cloud-native based environments).
Proficiency with tools such as Burp Suite, common command-line tools, and ability to write custom scripts when needed.
Experience in automating pent