Simeon Diamantidis was born in 1963 in Nea Michaniona of Thessaloniki. He is President and CEO of Diopas SA since 1982.
- President of the Association of Professionals and Craftsmen of Nea Michaniona 2006-2010
- Vice-President of the Thessaloniki Chamber of Handicrafts 2008-2013
- Financial Supervisor of SEVE-Greek Exporters Association from 2018-2022
- Member of the Board of the Thessaloniki Chamber of Handicrafts
- Member of the Board of the Thessaloniki Chamber of Commerce & Industry
- Member of the Board of the Professional Chamber of Thessaloniki
- Member of the Administrative Committee of KEPA ANEM
- Member of the Board of the Thess-Intec
From June 2022 he is President of SEVE-Greek Exporters Association.
