 On 20 October 2009 Colomba was appointed new head coach of Bologna, taking over from Giuseppe Papadopulo.Notably, despite being born in Grosseto, Colomba grew up in Bologna and is a fan of the local club since childhood, and Bologna was also the club that gave him the chance to make his professional football debut.After taking the reins of the "rossoblu" club, he defined his appointment as head coach of Bologna as a dream coming true.