1. Special and Laboratory Teaching Staff, Department of Business Administration, School of Business, Economics and Social Sciences, University of West Attica
2. M.Sc. Graduate, Department of Business Administration, School of Business, Economics and Social Sciences, University of West Attica
3. Associate Professor, Department of Accounting and Finance, School of Business and Economics, University of West Attica
4. Dr., Chemical Engineer, Teaching and Research Associate, School of Electrical and Computer Engineering, Electric Power Division, Photometry Laboratory, National Technical University of Athens