Prior to the amalgamation of Toronto, Di Giorgio was a member of the North York City Council from 1985 to 1997, representing Ward 4.

His contribution as founding director of the Ford Performing Arts Centre and his help in creating the Capital Planning Committee brought both a knowledgeable voice and prudent change to North York.

[1] In his role as Toronto city councillor, Di Giorgio was appointed budget chief under Mayor Rob Ford in 2013.

He was a member of the Executive Committee[3] and sat on the Board of Directors for Toronto Community Housing Corporation (TCHC) as the Mayor's designate.

[4] Di Giorgio ran for re-election as councillor in the newly formed Ward 5 York South—Weston in the 2018 Toronto election and lost to Frances Nunziata.