[1][2] He made 124 appearances in 5 years before his 2011 departure as vice-captain[citation needed] to Novara for free.

[3][4] On 20 July 2012 he was signed by A.C. Siena, with Lorenzo Del Prete moved to opposite direction.

In September 2015, he then moved to The United States to participate in master courses reserved for coaches.

[12] After guiding Teramo to the promotion playoff, which ended in a first-round loss to Palermo, he was hired by Serie B club Pordenone on a two-year deal.

[16] On 23 January 2024, Paci returned to management as the new head coach of struggling Serie C club Pro Sesto until the end of the season.