Smallenbroek attended the
Rijks Hogere Burgerschool (Assen) in
Assen from April 1926 until May 1931. Smallenbroek worked as a civil servant for the
municipality of
Ooststellingwerf from May 1931 until July 1936 and for the municipality of
Elburg from July 1936 until April 1941. Smallenbroek served on the
Municipal Council of Elburg from September 1939 until September 1941 and served as an Alderman in Elburg at the same time. On 10 May 1940
Nazi Germany invaded the Netherlands and the
government fled to
London to escape the
German occupation. Smallenbroek served as acting
Mayor of Elburg from 1 April 1940 until 15 May 1940. Smallenbroek joined the
Dutch resistance against the
German occupiers in May 1940. Smallenbroek worked as a civil servant for the municipality of Assen from September 1941 until April 1942 and as a tax collector for the
Tax and Customs Administration of the
Ministry of Finance from April 1942 until January 1944. On 12 January 1944 Smallenbroek was arrested by the
Gestapo and detained in a
Oranjehotel in
Scheveningen and was released on 5 May 1945. Following the end of
World War II Queen Wilhelmina ordered a
Recall of Parliament and Smallenbroek was appointment as a
Member of the House of Representatives taking the place of Willem Wagenaar, taking office on 20 November 1945 serving as a
frontbencher and the
de facto Whip. After the
election of 1946 Smallenbroek wasn't reelected and he continued to serve until the end of the parliamentary term on 4 June 1946. Smallenbroek served on the
Provincial-Council of
Drenthe from 19 June 1946 until 14 April 1965 and as a member of the
Provincial-executive of Drenthe at the same time. After the
election of 1956 Smallenbroek returned as Member of the House of Representatives, taking office on 6 November 1956 serving as a frontbencher and
spokesperson for
the Interior,
Social Affairs,
Social Work and Civil Service. After the
election of 1963 the
Leader of the Anti-Revolutionary Party and
Parliamentary leader of the Anti-Revolutionary Party in the House of Representatives
Barend Biesheuvel was appointed as
Deputy Prime Minister,
Minister of Agriculture and Fisheries and
Minister for Suriname and Netherlands Antilles Affairs in the
Cabinet Marijnen, the
Anti-Revolutionary Party leadership approached Smallenbroek as his successor as Parliamentary leader, Smallenbroek accepted and became the Parliamentary leader, taking office on 24 July 1963. On 27 February 1965 the Cabinet Marijnen fell and continued to serve in a
demissionary capacity until the
cabinet formation of 1965 when it was replaced with the
Cabinet Cals with Smallenbroek appointed as
Minister of the Interior, taking office on 14 April 1965. On 31 August 1966 Smallenbroek resigned following a
Hit and run accident due to
driving under the influence. Smallenbroek remained in active in national politics, in August 1967 he was nominated as a
Member of the Council of State, taking office on 1 September 1967. In June 1967 Smallenbroek was diagnosed with
terminal cancer, he died four months later at the age of 65. Smallenbroek was known for his abilities as a
manager and
policy wonk. ==Decorations==