Stylianos (Stelios) Gisdakis is an accomplished professional in data science and analytics, currently serving as Senior Director of Core Platform at Visa Global Open Banking since October 2024. Prior experience includes roles as Director of Data & Analytics at Tink, Head of Data Science at Anyfin, and Senior Data Scientist at Spotify. Gisdakis has a strong background in machine learning, having developed models for credit risk and fraud at Klarna, where Stylianos (Stelios) also led a data science team. An academic foundation includes a Ph.D. and a Licentiate degree in Electrical and Electronics Engineering from KTH Royal Institute of Technology, supplemented by a Master's in Information and Communication System's Security and a Diploma in Computer Science. Gisdakis has also contributed to the academic field as a researcher and teaching assistant, focusing on security-related courses and machine-learning applications for fraud detection.