Pajula served as Mayor of Sortavala in 1907–1917. He has been employed by the Ministry for Foreign Affairs since 1919 and served as Envoy in Copenhagen from 1939 to 1945. Pajula received the Honorary Doctor of Law degree in 1955. He also participated in the Tribal War's Aunus expedition in 1919 and served as a member of the Aunus Interim Administration.