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Offensive Security Engineer

LSEG

Senior

Listed on LSEG’s own careers site. You apply with them directly — we never stand between you and the employer.

What this role is

This role leads vulnerability discovery and offensive security testing programmes across a major financial services organisation, coordinating with third-party vendors and internal teams to validate findings and drive remediation at scale. It suits someone with hands-on penetration testing or red team experience who can bridge technical depth with programme management and wants to shape security strategy in a large enterprise.

Our summary, not LSEG’s wording. The full posting is on their site.

Skills this role names

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What they ask for

Required

  • Bachelor's degree in technology or equivalent cyber security certifications
  • Understanding of large-scale enterprise IT environments
  • Knowledge of security vulnerabilities and common software flaws
  • Experience validating and triaging vulnerability reports
  • Strong communication and presentation skills

Nice to have

  • Red Teaming, Penetration Testing or Bug Bounty background
  • Experience building AI agentic workflows
  • Experience deploying and managing security tooling
  • Understanding of MITRE ATT&CK, Kill Chain and OWASP frameworks

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