Πίσω στις εκδηλώσεις Ακούστε την ομιλία (Podcast)​ Curriculum Vitae of the Speaker Vayianna Kouroupi​ Vayianna Kouroupi is the Operating Principal of Keller Williams Cosmos , with significant experience in developing people, teams, and professional culture. She studied International and European Economic Studies at the Athens University of Economics and Business and holds a Master’s degree in … Continue reading Keller Williams: The People Code Red, Yellow, Green, Blue: Learn to recognize personalities and speak the language each person hears.