He served as Minister of Health on Social Services in Lipponen"s second cabinet between 14 April 2000 and 19 April 2002. Soininvaara has a licentiate degree in statistics. Before his political career he worked as a statistician.
He was elected in Helsinki city council in 1985 and has served in various positions of trust in the city administration since then
After a break he was elected to the parliament again in 2011. Osmo Soininvaara is married to Anna-Maria Soininvaara and they have three children: Ohto (born 1990), Ilppo (born 1991), and Helmi (born 1997).
Soininvaara is a long-time advocate of a basic income and has published several books and reports on this topic. In Hyvinvointivaltion eloonjäämisoppi, awarded as the best economics book of 1994, he proposed a detailed basic income scheme differentiated for household composition.