Born in Talpa village, now in Cândești Commune, Botoșani County, Cozmâncă graduated from the Law Faculty of the University of Bucharest in 1971.
From 1989 to 1990, a period that spanned the fall of the Communist regime, he was an inspector for the government.
From 1992 to 1996, he was a secretary of state, heading the Department of Local Public Administration.
[1] Elected to the Senate in 1996, he sat on various committees there: budget, finance, banking and capital markets (1996–2000); public administration, territorial organisation and environmental protection (1996–2000; 2004–2005);[4][5] foreign policy (2003–2004);[6] joint committee providing oversight to the activities of the Romanian Intelligence Service (2004–2008).
[1][3] Following criticisms of the party that he issued, the PSD removed him as a member in 2009.