He attended local parochial schools for a few years, but had to go to work at the age of twelve.
He became a member of the Iron Molders' Union Local 125, and joined the Socialist Party in 1906.
In 1918, Cieszynski (who had never held public office) was the Socialist nominee in Milwaukee County's 8th Assembly District (then consisting sole of the 8th Ward), losing to incumbent Democrat Frank Kubatzki by 1147 to 756.
[2] In 1924 Cieszynski was elected to succeed fellow Socialist John Polakowski, who did not seek re-election, winning 2500 votes to 2,317 for Republican Louis S. Polewezynski and 1,604 for Democrat C. W. Drewek; and was assigned to the standing committee on municipalities.
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