Johann was born to Catholic parents in the part of Austria known as Carinthia, where he was raised on the family farm. Johann enjoyed acting and belonged to a theater group in nearby Sankt Martin, which also happened to have a Jehovah's Witness congregation. He became a Jehovah's Witness during the late 1920s, actively preaching in the district around Sankt Martin.

1933-39: Johann continued to do missionary work for the Jehovah's Witnesses even after this was banned by the Austrian government in 1936. The situation for Jehovah's Witnessesworsened after Germany annexed Austria in March 1938. Like other Witnesses, Johann refused to give the Hitler salute, to swear an oath of loyalty to Hitler, or to enlist in the army.

1940-44: In April 1940 Johann was arrested by the Gestapo and imprisoned in Klagenfurt. The Nazis deported him to theNeuengamme concentration camp, and then to theSachsenhausen camp. In Sachsenhausen, the Germans tried to force Johann to repudiate his faith as a Jehovah's Witness, but Johann refused. Though it was forbidden, he had secretly hidden a tiny Bible, and reading Scripture enabled him to fortify his belief that the power of God was stronger than the power of the Nazi regime.

Johann was executed on May 7, 1944, in Sachsenhausen. He was 34 years old.

Johann Stossier