After receiving his doctorate degree from WU, Ewald Judt made a carrier in the banking business and was there more than 30 years Managing Director of a bank specialized in payment systems. Beside his job he was active as a lecturer at WU for many years. In 2004, Ewald Judt was made an Honorary Professor of the WU where he is involved in teaching and research at the Institute for Marketing Management.

Ewald Judt's main fields of interest are bank marketing, innovations, two-sided markets, payment systems, branding, business models; customer loyalty, sales and service excellence. He is member of the Editorial Board of the publication series “Financial Services Management”, Weißensee Verlag (Berlin), as well as co-publisher of the periodicals "bank und markt" and "Karten-cards-cartes", both Fritz Knapp Verlag (Frankfurt/Main).