In his stay at Parma, he became one of the fan favourites, earning the nickname "Il Sindaco" (The Mayor) by the local supporters, and he was a key player for the team that climbed the Italian football divisions, up from Serie C1 to the top division, Serie A.
In 2006–07, Osio served as head coach of Crociati Parma (also known as Crociati Noceto),[2][3] with whom he won Eccellenza and ensured promotion to the 2007–08 Serie D. [4] In July 2007, he was chosen by Serie C2 club Nuorese for their head coaching position.
[5] He was however sacked on 17 September due to poor results in the beginning of Nuorese's 2007–08 Serie C2 campaign (one point in three matches).
[6] On 12 January 2011 he became the new coach of Fortis Juventus in Serie D in place of the sacked Roberto Galbiati.
[7] On 29 November 2011 he becomes the new coach of Ancona 1905 in Serie D, in place of the sacked Massimiliano Favo,[8] until 3 February 2012 when he rescinds the contract by mutual agreement with the company.