On 15 August 1947, he was appointed as the first Chief Minister of West Punjab in Pakistan. Having foregone his constituency in Firozepur district and extensive estates in East Punjab, Mamdot sought to rebuild his powerbase in Pakistan. Without official sanction, he created the Allotment Revising Committee to cultivate new followers amongst refugees, and allegedly siphoned off properties and cars to his followers and former tenants. He became the largest claimant for agricultural land amongst the refugees. He opposed his minister for refugee rehabilitation Mian Iftikharuddin, whose reformist proposals advocated permanently settling refugees on evacuee property and excess land belonging to bigger landlords. His stance, together with his refusal to cooperate with the centrally appointed Pakistan and West Punjab Refugee and Rehabilitation Council led to the resignation of Mian Iftikharuddin, and provided a free hand to Mamdot to allocate evacuee properties as he wished. Factionalism plagued Mamdot's ministry. Aside from conflict with Mian Iftikharuddin and Ghazanfar Ali Khan, head of the Refugee and Rehabilitation Council, he clashed with Mumtaz Daultana and Sir Francis Mudie. He labelled Mudie, the first Governor of West Punjab, a "foreigner", "pro-unionist" and "pro-Indian" and in turn, Mudie criticised him alleging that he remained in power to get his hands on more property. Mamdot's ministry endured widespread accusations of corruption, and was labelled "unbelievably corrupt" by one British official. It was alleged he used public funds to personally acquire about 2,000 acres of prime agricultural land at nominal rates in Montgomery District, that he awarded to his brother several hundred acres of land in the same district that belonged to Sir Khizar Hayat Tiwana and that he secretly deposited over 100,000 rupees from the Kashmir fund to his brother. Rival politicians alleged that he diluted their powerbases by relocating their supporters randomly across the province. A spokesman for the Rajput refugee community criticised Mamdot for not settling refugees together in accordance with the districts they came from, and noted that one village had refugees from between 13/14 different East Punjab districts which resulted in clashes on a daily basis. Mamdot resigned as Chief Minister in 1949 and an official enquiry was launched against him in relation to maladministration. As no-one was able to form a new ministry, the Governor of West Punjab assumed direct control of the province. In 1950 he left the Muslim League to form a new party, the Jinnah Muslim League, which contested the 1951 elections against the Muslim League led by his arch-rival Mumtaz Daultana. One consequence of the claims against Mamdot appeared following the result of the election, as representatives of refugees constituted just 5 per cent of the Punjab Assembly, despite refugees constituting about one-third of the total Punjabi population.
Later life
He rejoined the Muslim League in 1953 and was appointed Governor of Sind by Sir Ghulam Muhammad in 1954 He resigned his post in 1955 following the departure of Sir Ghulam from the political scene, and thereafter remained in the political wilderness. Mamdot died in Lahore on 16 October 1969.
