In his first term, he co-drafted the Twenty-Fifth Amendment to the Constitution of Pakistan, which merged the Federally Administered Tribal Areas with Khyber Pakhtunkhwa.

He completed his Bachelor of Arts from Forman Christian College in 1975, and his LLB from Punjab University in 1980, where he also taught as adjunct lecturer for international law from 1984 to 1988.

After Musharraf declared a state of emergency in 2007, Ausaf was detained by the military regime from the Lahore office of the Human Rights Commission of Pakistan on 5 November 2007.

He stepped down when the caretaker government took over for the 2013 elections, and resumed private practice at his law firm, Ashtar Ali & Co.[5] On 29 June 2013, Ausaf's convoy came across two armed dacoits robbing a woman in Garden Town, Lahore.

[7] As Attorney-General, he co-drafted the Twenty-Fifth Amendment to the Constitution of Pakistan, which merged the Federally Administered Tribal Areas with Khyber Pakhtunkhwa province.

[8] Ausaf returned as AG on 9 May 2022, when President Arif Alvi approved his appointment on the advice of Prime Minister Shehbaz Sharif.