 In 2011, Musasizi bid for the Rubanda County East parliamentary seat on the NRM ticket, and went on to win in both the party’s primaries and in the general elections and became a member of Uganda's 9th Parliament.In 2016, Musasizi won reelection and continues to serve the constituents of Rubanda County East in the 10th Parliament of the Republic of Uganda.In the 9th Parliament, Musasizi served on the "Public Accounts Committee".