1900
Signing of a general representative agreement with the Greek firm Zachariou & Co.
1926
Founding of Griechische Telefon AG with a 75% S&H stake.
1935
Founding of the Eviop Tempo AG, Electrical Equipment Manufacturer Aegaleo, with a majority stake held by Siemens.
1939
Founding of the Siemens Hellenische Elektrotechnische AG, Elektrotechnische Projekte und Erzeugnisse.
1952
Major order for equipping 12 metro trainsets for the subway line linking Piraeus and Athens.
1964
Founding of the Siemens Tele Industry S.A.
1971
Contract between the state utility DEI and a German-Greek Siemens consortium for the supply and installation of six transformer stations in Athens and Saloniki.
1982
Siemens Hellas Elektrotechnische AG is renamed Siemens AG Elektrotechnische Projekte und Erzeugnisse.
1983
A pilot photovoltaic system is commissioned on the island of Kythnos in the Cyclades.
1990
Siemens Tele Industrie AG, Thessaloniki, wins an order from the Greek telephone company OTE to supply 13 digital central and transit offices and two container digital electronic switching systems.
1998
Siemens Metering S.A. (formerly Landis & Gyr) in Korinth becomes a wholly-owned subsidiary of Siemens S.A.
2000
Founding of offices in Macedonia and Cyprus.
2004
All Siemens Groups successfully participate in numerous key projects for the Summer Olympic Games in Athens
2007
Siemens secures an order to provide the entire electromechanical infrastructure and security systems for the new Acropolis Museum