He also worked as editor for the religious newspapers Siionin lähetyslehti and Zions missionstidning in 1919–1945, as well as a member of parliament with the National Coalition Party in 1922–1929 and 1930–1933.
[1] After graduating Volksschule, Oskari Jussila went to oppikoulu in Kuopio classic lyceum in 1908 and began his theological studies in University of Helsinki, finishing them in 1913.
In the end of 1920, Jussila visited Michigan and Minnesota for four months, participating in the investigation of the dispersion within Heidemanism, the local Laestadian movement.
At the end of the civil war, Jussila worked as the manager of an ambulance, i.e. a mobile field hospital, provided by the Conservative Laestasianism movement.
Starting from 1919, Jussila considered it important to support Fenno-nationalistic activity, with the purpose of "educating" the Finnish population of Norrbotten in Northern Sweden.
Jussila's work with pastoral care in the Finnish speaker populated areas of Northern Sweden in the 1920s attracted ill attention from the Swedish national circles.
In 1920, Jussila visited the Finnish regions in Northern United States, and condemned the local Apostolic Lutheran movement.
In addition, the song collection Siionin laulut, compiled by Jussila since its establishment in 1916 until 1939, has created a lasting impression in the Laestadian movement.