Dr. Apostolopoulos is the CEO of Athens Medical Group, the leading health care services group in Greece and Southeastern Europe. The Group is listed on the Athens Stock Exchange (ASE). Dr. Apostolopoulos is also the CEO of G. Apostolopoulos Holdings SA and the Honorary Consul of Monaco in Athens.

He is the Honorary President and member of the Board of Directors of the Hellenic Entrepreneurs Association - EENE (Term 2012-2022) and member of the General Council of the Hellenic Federation of Industries (SEV). He is a member of the Advisory board of the Hellenic Observatory at the London School of Economics (LSE), member of the Advisory Board of University of Athens MBA and member of the Board of Directors of “Athens Club”, the most historic club in Greece.

In 2020 he was awarded the "Lifetime Achievement Award" of the British Council, given for the first time to a Greek, and in March 2022, he received the Innovative “Entrepreneur of the Year” Award by EY.

He is married to Roy Danalis and is the father of four children.