sentences:  In April 1953 De Jong was promoted to Commander and in March 1955 De Jong was appointment as chief of staff to the Inspector General of the Navy Lieutenant admiral Prince Bernhard and as chief military adjutant and senior "aide-de-camp" to Queen Juliana.In October 1958 De Jong was promoted to Captain and appointment as Commanding Officer of the destroyer HNLMS "Gelderland".After the election of 1959 De Jong was approached by the Leader of the Catholic People's Party Carl Romme as a candidate for State Secretary for Defence of Naval Affairs, De Jong accepted and was appointed as State Secretary for Defence in the Cabinet De Quay, taking office on 25 June 1959.