 He was also acting Prime Minister in the second government of Pehr Evind Svinhufvud from 18 February to 21 March 1931.He also served as Deputy Minister of Finance (1918–1919), Minister of Trade and Industry (1919), Minister of Foreign Affairs (1922–1924) and Minister of Finance (1930–1931).Vennola, who was born in Oulu, served as a member of the parliament from 1919 to 1930 and was a member of the Tartu Board of Peace in 1920.