Nordex will supply ten turbines to the two sites. First, the German manufacturer will supply five N100 3.3MW high wind turbines to the Mougoulios project.
Second, three N100 3.3MW and two N90 2.5MW turbines will be delivered to the Plagia Psiloma site. Both projects are located near Athens in southern Greece.
Both sites are due to be completed in early 2017, Nordex said.
Greece could see 210MW of new wind capacity installed this year, according to estimates by the Hellenic Wind Energy Association.
In 2015, Greece's wind capacity rose 148MW to 2,128MW. Construction of new Greek wind farms may be postponed, however, as investors wait for clarification on some aspects of a new support mechanism.
Last week, Nordex also secured a deal with asset management firm Taaleri to supply six turbines to expand the Kivivaara-Peuravaara project in Finland.
A further six N131 3MW turbines will be added to the 13 of the same machines planned for the site, following a deal with the project owner in March.
Nordex will service the cold climate-adapted turbines for 15 years.