[5] Before that, he served as Vice Chancellor of Jamia Millia Islamia, he resigned from the post a few months short of his full term.

[10] He was handed over charge by Professor Khurshid Iqbal Andrabi who had been serving as officiating Vice-Chancellor since October 2017 after his tenure was over.

[14] In 1999–2000, he did another postdoctoral fellowship under Japanese Society for Promotion of Science (JSPS) with Nagoya University, Japan.

[16] Later, he worked as a Scientist with Wadia Institute of Himalayan Geology, Dehra Dun from 16 July 1984 to 3 September 1989.

Ahmad worked at the Wadia Institute of Himalayan Geology, Dehra Dun, as a scientist under DST for nineteen years (1984–2003).

Ahmad joined Jamia Millia Islamia on 15 May 2014, taking over from officiating Vice-Chancellor Prof S M Sajid and thus succeeded Najeeb Jung after he was sworn in as the 20th lieutenant governor of Delhi in April 2013.

Thereafter, he was given a second term on 1 December 2024 for three more years till 31 November 2027 whereas he served as Indian National Science Academy (INSA) Senior Scientist.

[21] He has been working on various sponsored projects, including Geochemical, Isotopic and Geochronological characterisation of Granotoids from the Central Indian Tectonic Zones (CITZ) and Central Indian Shear Zones (CISZ)-Constraints on Pre-cambrian Crystal Evolution, funded by Indo-Russian, ILTP Project, and Proterozoic mafic magmatism in the Central Indian Tectonic Zone (CITZ): elemental and isotopic constraints on crystal evolution and geodynamics.