He assumed the office of Vice Chief on 31 December 2016 from Air Chief Marshal Birender Singh Dhanoa and served in the same capacity till his retirement on 30 September 2018.

He attended Somalwar School and is an alumnus of Defence Services Staff College, Wellington.

[5][6] Deo was commissioned into the fighter stream of the Indian Air Force on 15 June 1979.

He has clocked more than 4000 hours of operational and training flying experience.

His younger brother, Justice Rohit Deo, is elevated as a Judge of the Bombay High Court on 5 June 2017.