Before becoming a
judge, he was an
advocate of the
Supreme Court Bar Association of Pakistan and the
Lahore High Court Bar Association. He was called to the Bar at the Honourable Society of
Lincoln's Inn,
London,
Great Britain on 26 July 1979. He also headed the larger bench of the Supreme Court that was hearing the "Panama Case" related to the alleged money laundering and off-shore illegal investment by former Prime Minister
Nawaz Sharif and his family. Remarking on articles 62 and 63 of the constitution in the "Panama Case" hearing he said:This case is the first of its kind… we know the gravity of a declaration by the court and its affect for both the parties, saying that someone was not honest. But we have to lay down parameters, otherwise, except for the Jamaat-i-Islami chief Sirajul Haq, no one will survive. As articles 62 and 63 are related to truthfulness and honesty of parliamentarians, it became a matter of controversy in the media, because Justice Khosa was pointing out that there is no truthful and honest parliamentarian except
Siraj-ul-Haq. Justice Khosa had to withdraw his remarks, after he reconsidered them. He said he was sorry for his such remarks. Justice Khosa is being considered the most relentless judge in larger bench of the "Panama Case". The final verdict issued by the larger bench on the "Panama Case" against Prime Minister Nawaz Sharif and his family has proposed a JIT within 60 days. In the final verdict Justice Khosa and Justice Gulzar in their remarks disqualified Prime Minister
Nawaz Sharif from running for office. Their statement says:The Election Commission of Pakistan is directed to issue a notification of disqualification of respondent No. 1 namely Mian Muhammad Nawaz Sharif from being a member of the Majlis-e-Shoora (Parliament) with effect from the date of announcement of the present judgment. On 2 January 2019, President
Arif Alvi approved Khosa's appointment as the next
Chief Justice of Pakistan. == Books ==