Tax law
Van der Stee applied at the Radboud University Nijmegen in June 1950 majoring in Tax law and obtaining an Bachelor of Laws degree in June 1952 before graduating with an Master of Laws degree on 29 February 1956. Van der Stee worked as a tax advisor in Arnhem from May 1956 until July 1971. Van der Stee served as Chairman of the Catholic People's Party from 30 March 1968 until 14 July 1971. Van der Stee was elected as a Member of the Senate after the Senate election of 1971, taking office on 11 May 1971.