This document certifies that Vasiliki Karkavela worked as a site engineer for AKTOR ATE from 1999 to 2009. It lists 11 major construction projects she worked on, including the reconstruction of the Zapeio building into a conference center, the reconstruction of the Athens Hilton Hotel, and the full construction of buildings for the National Bank of Greece, American College, Institute of Computer Technologies, Elliniki Technodromiki, Alpha Channel, Star Channel, and Athens American College. For each project, her responsibilities included coordinating designs and shop drawings, conducting market research, managing subcontracts, and overseeing site construction, installation, commissioning, and handover.