Polina Korosteleva

Polina is a strategic technology leader and enterprise architect with more than 15 years of experience shaping and delivering digital transformation across highly regulated industries, including financial services, energy, and government. She is currently Principal Enterprise Security Architect at Trainline, where she is responsible for enterprise security architecture strategy across product, platforms, and corporate technology. She defines the strategic roadmaps for security function and long-term security capability development, while leading the organisation’s Zero Trust transformation across identity, cloud infrastructure, network, and application layers. Previously, Polina worked as Principal Enterprise Security Architect at bp, leading security architecture and strategy for global digital initiatives spanning infrastructure, data, applications, and workplace technology. Before bp, she held security architecture roles at Capgemini, designing secure and scalable solutions for comp