After completing his studies, he taught at madrasas in Ferozepur Jhirka and Calcutta and then at Hayaatul Ulum in Muradabad.
Ali Asghar was Mansabdar (Punj Hazari) Emir and was posted first as Faujdar at Moazamabad; Khidmat Daroghgi Topkhana, a store of Armory (military) at Multan; Naib Subahdar at Azimabad (Patna); and then Subahdar at Awadh during the reign from Farrukhsiyar to Muhammad Shah.