Lead Security Architect London | £135k + Benefits | Permanent The Opportunity Our client, a prestigious global law firm, is seeking an exceptional Lead Security Architect to join their award-winning Information Security team. This is a rare opportunity to lead security architecture strategy across cutting-edge platforms including M365, AI systems, data platforms, and legal technology at a firm that places security at the heart of everything it does. Working closely with the Head of Security Architecture and Engineering, you''ll orchestrate a talented team while collaborating directly with cybersecurity lawyers who advise on hundreds of incidents globally, providing unique insights that few organisations can offer. Key Responsibilities Strategic Leadership: Develop and maintain comprehensive security architecture strategies across diverse technology platforms Platform Security: Lead security architecture for M365, AI, data platforms, legal tech, and knowledge management systems Design Assurance: Review and approve security designs for new services, platform upgrades, and major integrations Risk Management: Drive identification and remediation of platform-specific security risks while ensuring regulatory compliance (GDPR, SOC2, ISO27001) Team Leadership: Mentor and manage a team of security architects and engineers, fostering cross-functional collaboration Stakeholder Engagement: Present complex security insights to senior leadership and influence technology investment decisio