Dr Sofia Guerra FREng has made key contributions to safety and assurance of digital systems and is internationally recognised as an expert in dependability assessment and justification of digital systems in the nuclear industry. As a leader and entrepreneur, she led Adelard’s growth until acquisition in 2022 and set up Themistoclea in 2025. She has pioneered the UK approach to justifying digital devices for nuclear facilities, impacting major projects, including UK nuclear build projects. She shaped international approaches to safety assurance, authored IAEA reports, and is a key contributor to innovation on AI in nuclear applications.