Commissioned as a fighter pilot in the Flying Branch of the Indian Air Force on 02 Jul 1973, Air Marshal Kumaria is a graduate of Defence Services Staff College (DSSC). He is a Qualified Weapon Instructor, having undergone the QWI course in the United Kingdom and a Fighter Combat Leader, who also served as a Directing Staff at the Tactics and Air Combat Development Establishment (TACDE).
He has held many important Field and Staff appointments in his service career. He has been Assistant Advisor (Air) at Indian High Commission in Dhaka, Bangladesh and has served as Defence Attaché at Indian Embassy in Rome (Italy) with concurrent accreditation to the Iberian countries. He was especially selected to write the Air Power Doctrine of the Indian Air Force in 1994.
He has commanded a frontline Jaguar Squadron specialising in Maritime Strike Role as well as a fighter airbase. He has operational experience of flying all versions of MiG-21 and Jaguar aircraft. He has also functioned as the Principle Director of Concept Studies at Air Headquarters (Vayu Bhavan), and as Air-I at Western Air Command (WAC). He was the first Assistant Chief of Air Staff Operations (Space) and the first Director General Air (Operations) at Air Headquarters (Vayu Bhavan). Before taking over as the Air Officer Commanding-in-Chief, Western Air Command, on 01 Jan 2011, Air Marshal Kumaria was the Senior Air Staff Officer (SASO) at the South Western Air Command at Gandhinagar.
Air Marshal Kumaria was awarded Vayu Sena Medal in 1983, Vishisht Seva Medal in 1996 and Ati Vishisht Seva Medal in 2007 for distinguished service of high order.