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Salary
≈ $72k – $163k per year (Estimated)
Location
Remote (United Kingdom)
Employment
Full-Time

Confirmed on the employer's own hiring board on Oct 20, 2026. First seen by Alion on May 27, 2026. London Stock Exchange scores A on the Alion truth index.

Overview
Company
Impact
Profile match
Headquartered in London, United Kingdom, the London Stock Exchange is one of the world's oldest and most prominent financial exchanges. It provides international capital markets, premier listing venues such as the Main Market and AIM, and electronic trading infrastructure for equities, bonds, and exchange-traded funds. As a core subsidiary of the London Stock Exchange Group, it connects global issuers with investors to facilitate efficient capital formation, market liquidity, and economic growth.

Join our Offensive Security Operations team as an Offensive Security Engineer. In this crucial role, you will manage vulnerability discovery, offensive testing, and remediation activities to protect the business from sophisticated cyber threats. You will collaborate with third-party vendors, regulators, and leadership teams to ensure the timely delivery of requirements. You will also have the opportunity to explore and experiment with AI and automation to improve our security initiatives.

Missions

  • Plan and facilitate testing programs with third-party vendors, ensuring efficient execution of vulnerability discovery and offensive testing.
  • Provide insight on root cause analysis and scalable risk management, working closely with technical teams and external stakeholders.
  • Stay ahead of emerging cyber security trends and share ideas for improvement, exploring the use of AI and automation in security initiatives.

Profil recherché

- Background in Red Teaming / Penetration Testing / Bug Bounty advantageous!

- Technology related Bachelor's Degree or equivalent experience and certifications in cyber security

- Experience building AI agentic workflows or deploying and managing security tooling is also advantageous!

- Knowledge of security vulnerabilities and common software engineering flaws and Network Defence analytical models (Kill Chain, ATT&CK, OWASP top 10etc.)

- Ability to work in a fast-paced environment as a problem solver and barrier breaker with initiative

- Understanding of large scale enterprise IT system environments

- Strong verbal & written communication skills & presentation skills

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