During his career, Jan was Joint Secretary for the
Ministry of Law and Secretary to the Parliamentary Affairs Division. As a jurist, he served on the
Lahore High Court,
Supreme Court of Pakistan (1986), and twice as its acting Chief Justice. Jan was a member of the Hague
Permanent Court of Arbitration's National Group and was appointed by the UN as a Judge for the
International Criminal Tribunal for the former Yugoslavia in 1996, succeeding
Rustam S. Sidhwa. ==References==