Yiannis Koulelis is a Graduate Food Technologist. He completed his postgraduate studies in Business Administration at Leicester University, earning his MBA and Food Quality Control at TDRI London. From 1988 until today, he has been active in the Greek wine sector, having held the positions of: Production Manager, Marketing Director, Commercial Director, and General Manager in some of the largest Greek companies in the production and marketing of wines & beverages as I. Boutaris & Son Winery SA, Ampeloiniki Ltd., Creta Olympias SA, KYR-YIANNI SA, VS Karoulias and others.

After more than thirty years of activity in the wine market of Greece, it now cooperates with commercial and production companies in the sector such as Ktima Vogiatzis, Ktima Tselepou, Vinalia IKE, and others, as a Marketing and sales consultant. Since 2006 he has held the position of Senior Lecturer in Wines & Marketing - Management at WSPC.