He served as the Deputy Menteri Besar of Kelantan and Member of the Kelantan State Executive Council (EXCO) in the Pakatan Rakyat (PR), Gagasan Sejahtera (GS) and Perikatan Nasional (PN) state administrations under Menteris Besar Nik Abdul Aziz Nik Mat and Ahmad Yakob from May 2013 and from March 2004 to August 2023 respectively as well as the Member of Parliament (MP) for Pengkalan Chepa from April 1995 to March 2004.

His eldest son Taqiyuddin Mohd Amar a Hafiz Al-Quran and an outstanding student at MTAQ Pulai Chondong passed away in June 2004.

At the same time Dato' Nik Amar studied in Sekolah Melayu Council (1965 - 1971) and proceed to the Master of Philosophy (MPhil) in United Kingdom.

Before being active in politics, Dato' Amar was a Lecturer in the Department of Revelation, International Islamic University Malaysia (IIUM), Petaling Jaya, Selangor and served for 10 years (1985-1995).

As Speaker, Mohd Amar vacated the Nenggiri state seat held and represented by its MLA Mohd Azizi Abu Naim of PN and the Malaysian United Indigenous Party (BERSATU) at the Kelantan state level, who was also the Gua Musang MP in the opposition at the federal level, who declared his support for the federal government and Prime Minister Anwar Ibrahim.