Mr Theodore Fessas is the founder, the major shareholder and Chairman of Quest Holdings SA, which was founded in 1981 (as Info-Quest), listed on the Athens Stock Exchange (1998) and operates through its affiliates in the IT sector, in e-commerce, in courier services, in renewable energy and in air conditioning products. He is also the major shareholder and Chairman of the listed real estate company BriQ Properties REIC.

He served as President of SEV - Hellenic Federation of Enterprises (2014-2020) and he is the Honorary President of the Federation of Hellenic Information Technology and Communications Enterprises (SEPE).

He studied Mechanical & Electrical Engineering at the National Technical University of Athens and holds a Master’s Degree in Thermodynamics from the University of Birmingham, UK.