2023 Selangor state election

In the 2023 Selangor state election, Jamil was one of the two candidates PN announced the earliest before the state election alongside Sungai Pelek PN candidate Suhaimi Mohd Ghazali who eventually lost to Lwi Kian Keong of Pakatan Harapan (PH).^[2] Jamil made his electoral debut after being nominated by PN to contest for the Dengkil state seat. Jamil won the seat and was elected to the Selangor State Legislative Assembly as the Dengkil MLA for the first term after narrowly defeating Noorazli Said of Barisan Nasional (BN), Darren Ong Chung Lee of Parti Sosialis Malaysia (PSM) and Mohd Daud Leong Abdullah of Parti Utama Rakyat (PUR) by a majority of only 407 votes.^[3] However, due to the narrow victory, there was initially a plan by PH to challenge by filing an election petition against the results^[4] but subsequently PH did not go ahead with the plan.^[5]

During the campaigning period of the state election, Jamil revealed that he had a team namely the 'DSJ (Datuk Seri Jamil) Team' composed of Dengkil residents who were helped by others who stay outside Dengkil to support his campaign. He also denied the allegations after being labelled as an 'election tourist' and 'foreign resident' living outside Dengkil. He said he had resided in Dengkil for more than 5 years and been in the Klang Valley for more than 40 years. As the Dengkil MLA, he pledged to make his experience in the KBS and KPDNHEP as a balancing force to give ideas and advices to ensure the plans of the state government of Selangor were on track. He also stressed that he maintained good relations and ties on the government level and this gave him the advantage to develop Dengkil and Selangor.^[6]