Christos Kostoulas is the Managing Director of DIGITAL 4U SA which is a member of the EPSILONNET Group. He has a degree in Electrical Engineering and holds a Master in Business Administration. In the past he was the CEO of ELTA Courier SA and General Manager of the Yellow Pages. DIGITAL 4U is considered one of the leading Digital Agencies with key areas wed design & development, performance marketing & brand outreach, having won awards at international & domestic competitions, for design & the S.E.O. in its collaboration with popular brands. It is the only Digital Agency in Greece with 2 ISO certifications, optimizing constantly the services it offers.