On Thursday (December 30), President Abdul Hamid appointed him in accordance with Article 95 (1) of the Constitution.

On March 26, 2013, Justice Hasan Fayez Siddiqui was sworn in as the Judge of the Appellate Division. He was earlier appointed as an additional judge of the High Court Division in 2006. In 2009, he was permanently appointed as a judge in the High Court Division.

Hasan Fayez Siddiqui was born on September 26, 1956. His father was late Abdul Gofur Mollah and his mother was Nurjahan Begum. Khoksa passed SSC from Janipur Pilot High School in 1982. He completed ISC from Government PC College, Satkhira in 1984. After passing BA from Satkhira Government College, he passed MA from Political Science Department of Dhaka University. He later passed LLB from Dhanmondi Law College and joined the Dhaka Judge's Court in 1981.

He joined the High Court in 1973 and the Appellate Division in 1997 as a lawyer. His elder brother Abu Bakar Siddiqui also retired as a judge of the Appellate Division. Justice Hasan Fayez Siddiqui has been serving as the Chairman of Bangladesh Judicial Service Commission since April 30, 2015.

After the much talked about resignation of the 21st Chief Justice of the country Surendra Kumar Sinha, Justice Syed Mahmud Hossain was sworn in as the 22nd Chief Justice on February 3, 2016. Syed Mahmud Haisen is retiring today (December 30, 2021) after 46 months as the Chief Justice. He will be replaced by Justice Hasan Fayez Siddiqui.