Constantin Ionescu (born 1956) graduated from the Faculty of Aeronautics, the University „Politehnica” of Bucharest. He worked as an engineer and researcher at the Aircraft Company in Bacău, the National Institute for Thermic Engines, INCREST and COMOTI SA (1982-1992).

Between 1992 and 2000, he was a member of the Chamber of Deputies as secretary of the Commission for Defence, Public Order and National Security (1992-1996). He consecutively held the offices of Secretary of State, Minister of Defence (1996-1998) and Minister of Interior (1999-2000).

He was a member and collaborator of various non-governmental organisations active in the public policies field, as well as in the security and defence systems. He graduated from the National Defence College (1994) and from the Defense Resources Management Institute (the USA, 1995). He holds a diploma in management from the Open University, Open Business School (Great Britain, 1993).

Constantin Ionescu was appointed State Adviser on 23 February 2015.