Vice Admiral Ioannis Kalogeropoulos HN graduated from the Hellenic Naval Academy in 1986. His operational service includes assignments on board surface units of the Hellenic Fleet, Destroyers, Frigates and Missile Boats as well as he served in staff positions both in Greece and abroad.

Among others, he has served as: Spokesperson of the Hellenic Navy General Staff, Director of Personnel at the Naval Training Command and the Fleet Headquarters, Director of Human Resources and Organization at the Hellenic National Defence General Staff (HNDGS), as well as Chief of Staff of the Fleet Headquarters. He has also served as Commanding Officer of HS XENOS and HS KANARIS, as well as Commander of Missile Boat Squadron Two,  Hellenic Navy Fast Boat Command, Hellenic Navy Non-Commissioned Academy, Hellenic Naval War College and Hellenic Naval Academy for two years.

In addition, he has served at the United States Central Command in Florida, participating in Operation Enduring Freedom, as well as at the European Maritime Force Staff in Rome, Italy.

He has graduated from Hellenic Supreme Joint War College, the Hellenic Naval War College, and the NATO Defence College, while he is a graduate of Department of Political Science and Public Administration of National and Kapodistrian University of Athens, specializing in European Studies, as well as University of Leicester in Great Britain in Business Administration. Finally, he has completed the PFP Communication Course in Mass Communication at SPITZ, Switzerland.

In March 2023, he was appointed to the position of Commanding Officer and Director of the Floating Naval Museum, Battleship Georgios Averof.

He has been awarded with all the medals, decorations and commendations stipulated for an officer of his rank and seniority.