Niilo worked most of his career until his death as an editor
or later as an advertising editor for the newspaper
He married Lahja Amanda Laakkonen in the year 1939.
During the war 1941-1944, Niilo served in the Infantry Regiment JR 26.
In the years before and after the war, Niilo was active in various activities,
including the Association of Conscripts, the Kookomus Youth Union and the Union of Finnish Work.
Niilo ja “Lali” raised three children,
Tuula Tellervo Kivinen née Kutvonen,
Juha Kutvonen, and
Anna-Liisa Kotamies née Kutvonen.