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From the employer's careers site First seen 2 Nov 2026

Offensive Security Engineer

The employer hasn't listed a salary.

Apply on London Stock Exchange Group (LSEG)

Description

This Offensive Security Engineer role within the Offensive Security Operations team is crucial for managing vulnerability discovery, offensive testing, and remediation activities across the group, protecting the business from sophisticated cyber threats.

The successful applicant will work with 3rd party vendors to plan and facilitate testing programmes, including Regulatory Threat Intelligence Led Pen Testing (TLTP) and Red teaming, Bug Bounty, Continuous External Attack Surface Management, and Active Directory security posture management.

As a domain authority on vulnerability testing, impact, and remediation, the role holder will provide insight on root cause analysis and scalable risk management, working closely with technical and external teams.

Responsibilities:

  • Collaborate with external vendors, regulators, and leadership teams to coordinate the timely delivery of requirements
  • Review vulnerability reports, validate issues reported, and triage based on risk
  • Support teams in understanding vulnerabilities and validate fixes through retesting
  • Coordinate remediation efforts by detailing actions, owners, timelines, and follow-up when appropriate
  • Leverage engineering skills to automate and scale security programme objectives

Requirements:

  • Technology-related Bachelor's Degree or equivalent experience and certifications in cyber security
  • Background in Red Teaming / Penetration Testing / Bug Bounty advantageous
  • Experience building AI agentic workflows or deploying and managing security tooling is also advantageous
  • Understanding of large-scale enterprise IT system environments
  • Knowledge of security vulnerabilities and common software engineering flaws and Network Defence analytical models
  • Strong verbal & written communication skills & presentation skills
  • Ability to work in a fast-paced environment as a problem solver and barrier breaker with initiative

Skills

Required

  • cyber security
  • vulnerability testing
  • penetration testing
  • bug bounty
  • AI agentic workflows
  • security tooling
  • enterprise IT systems
  • network defence

Nice to have

  • Red Teaming

Ready to apply?

You apply with the employer directly. Their original posting is here: https://lseg.wd3.myworkdayjobs.com/en-US/Careers/job/London-United-Kingdom/Offensive-Security-Engineer_R0120088

Apply on London Stock Exchange Group (LSEG)