Dionysia Xirokosta is a lawyer who has worked as a scientific associate of the Hellenic Competition Commission from 2001. She was appointed Head of the Legal Services Department in 2007. In 2009 she was appointed Director of the Legal Services Department. In 2010 she became the Director General of the Hellenic Competition Commission and acted for two full terms.

She then moved to the retail sector and was the Human Resources Director at “HELLENIC HYPERMARKETS SKLAVENITIS S.A.”. Currently she practices law and is a Consultant of Corporate Affairs at “HELLENIC SUPERMARKETS SKLAVENITIS S.A.”.

She has graduated from Athens Law School and holds an LL.M. degree in European Law from University of Essex Law School, specialized in European Competition Law.