 He guided Bologna to keep their place in the Serie A in 2009–10, however his position was put under question after Sergio Porcedda took over the club.Originally confirmed at the helm of the club, he was ultimately dismissed on 29 August 2010, exactly one day before the first game of the season, allegedly due to disagreements with the board.On 5 April 2011, Colomba was announced as the new head coach of Parma, replacing Pasquale Marino, and saved the club from relegation, being subsequently confirmed at the helm of the club also for the new season.