Stefania Sellis

Stefania (Stef) Sellis serves as the Head of Business Intelligence at Dialectica since June 2023, contributing to the enhancement of business decision-making through real-time information and market insights. Prior to this role, Stef held various positions at Walmart Connect from February 2019 to June 2023, leading the Data Solutions team and managing self-serve analytics tools while partnering with Product, Sales, and Marketing teams. Stef's prior experience includes significant roles at Beckon, Inc., where responsibilities ranged from Data Architecture and Integration Manager to Associate Client Director, advising clients on marketing measurement strategies and creating scalable data architectures for Fortune 500 clients. Additionally, Stef has held positions at MobAds, Mavatar Technologies Inc., E-Learning Πανεπιστήμιο Αθηνών, and ICAP, acquiring a wealth of experience in data analytics and project management. Stef holds a Master’s Degree in Financial Mathematics from The University of Edinburgh and a Bachelor’s Degree in Statistics from Athens University of Economics and Business.