He is a member of the United Malays National Organisation (UMNO), a component party of the BN coalition.
On 13 June 2018, Hamizan was appointed as the Perlis State EXCO Member in charge of Utilities, Public Facilities, Transport, Youth, Sports and Non-governmental Organisations (NGOs) by Menteri Besar Azlan.
He won the seat and was elected into the Perlis State Legislative Assembly as the Kayang MLA after narrowly defeating Abdul Hannaan Khairy of Pakatan Harapan (PH) and Md Radzi Hassan of Gagasan Sejahtera (GS) by a majority of only 435 votes.
In the 2022 Perlis state election, Hamizan was renominated by BN to defend the Kayang seat.
He lost the seat and was not reelected as the Kayang MLA after losing to Asrul Aimran Abdul Jalil of Perikatan Nasional (PN) by a minority of 3,261 votes.