Head of Security Architecture Stock Exchange Group

Head of Security Architecture - London Stock Exchange Group

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As Group Director, Head of Security Architecture, you’ll be a core member of the LSEG Cyber Security team. You’ll lead and set the direction for the Cyber Security Architecture team which delivers across a number of areas:

• Principal Security Architecture – a team of engineers who ensure security is built into all projects across the group. Each architect is aligned to our business units and builds a deep relationship with the teams in that unit.
• Security Architecture Design – a central function that delivers design patterns to ensure a consistent implementation of our controls across the group. This team researches new technologies and provides guidance on how to secure them. They also run a project to provide a risk‑posture review across the application portfolio against our standards.
• Security Architecture Review – a central function that delivers a range of security reviews – architecture governance reviews for new build and change projects; network perimeter / firewall reviews; and third‑party reviews ensuring our vendor / supply‑chain portfolio meets our security standards.

You and your teams will be involved in all major projects in the group – ranging from technology new build, cloud migration projects, transformation programs, as well as mergers, acquisitions and divestments. As a critical national infrastructure provider across many global regulated markets, you will ensure our technology systems are architected to meet the security rules expected by regulators, customers and partners.

You will need to have technical skills and experience in securing complex financial applications. The role requires a broad Security Architecture knowledge, but specifically deep application security skills. We have a separate Security Engineering team who look after infrastructure and platform security.

• Lead the development and execution of strategy for the Security Architecture team, setting and driving the achievement of KPIs and objectives through effective leadership and ensuring alignment with the broader Cyber Security and Architecture Functions’ strategy.
• Manage performance, development and wellbeing of a team of architects across various technology domains, providing end‑to‑end architecture services.
• Own relationships with key stakeholders – including Cyber Security peers, group CTO, Heads of Architecture, First and Second line Engineering Risk, Business Information Security Officers. Define, manage and operate the key functions of the Security Architecture team – Secure Design, Principal Security Architecture, Security Architecture review.
• Define architecture principles, policies and standards to produce function‑specific reference architectures and patterns.
• Contribute to the development of global enterprise standards for the central Architecture & Technology Strategy function.
• Build relationships with vendors, regulators and industry bodies to seek and adopt industry best practices in enterprise architecture and technology strategy.
• Seek latest technology and business innovations relevant for the function (e.g., Automation, Artificial Intelligence, Quantum Computing, etc.).
• Act as trusted advisor and leader across the wider LSEG Engineering group.
• Ensure Engineering projects meet critical security regulations (DORA, LPM, etc.).
• Lead security engagement on major transformations.

• Knowledge of financial market infrastructure technology and experience in deploying pragmatic security controls (e.g., trading systems, market data systems, low‑latency technology).
• Strong deep expertise in Application Security Architecture and controls. The Security Architecture team is application‑security focused.
• Enterprise Architecture, Technology Strategy, Cloud, Security, Applications and Infrastructure experience.
• Performing detailed security reviews of complex systems.
• Experience working with architectural development methodology, standards development, and technology architecture.
• Qualifications in security…