Vice Admiral Ajendra Bahadur Singh assumed the duties of Deputy Chief of Integrated Defence Staff (Doctrine Organisation Training). A recipient of Vishisht Seva Medal in 2011 and Ati Vishisht Seva Medal in 2016 for his exemplary service to the nation, he is an alumni of UP Sainik School Lucknow and the prestigious National Defence Academy which he joined in Jul 1979. A specialist in Navigation and Aircraft Direction, the Flag Officer has served in large number of operational naval ships. He was the Navigating officer of INS Kamorta (during OP PAWAN), and Destroyer Ranjit, besides being the Fleet Navigating Officer of Western Fleet during Op PARAKRAM.
Vice Admiral AB Singh has commanded INS Ships Veer (Missile Vessel), Vendhyagiri (Frigate), Trishul (Guided Missile Frigate) and Viraat (Aircraft Carrier). The Flag Officer has also been an instructor at the National Defence Academy, Khadakwasla, Navigation & Direction School, Kochi and Directing Staff at DSSC Wellington.
The Flag Officer has served at Naval Headquarters as Deputy Director and Principal Director at the Directorate of Naval Plans. He also set up the Directorate of Strategy, Concepts and Transformation as the Principal Director.
The Flag Officer earned his postgraduate degree from Madras University during the DSSC Course at Wellington, Wherein he was awarded the Scudder Medal. The Flag Officer has also earned a Master Degree in Global Security from Cranfield University, UK in 2005.
He was promoted to Two Star Flag Rank in 2012 and has served in important staff appointments of Flag Officer AOB Project, Assistant Chief of Naval Staff (Policy & Plans) at Naval Headquarters. Later he was selected for operational command the Eastern Fleet as a Flag Officer.
On promotion to Vice Admiral, in 2015, he was appointed as Dy Commander-in-Chief, Strategic Forces Command which deals with the Indian Nuclear Forces. He was the Chief of Staff, Western Naval Command at Mumbai prior to assuming charge of Deputy Chief of Integrated Defence Staff (Doctrine Organisation Training).