An alumnus of the National Defence Academy, Air Marshal Tejinder was commissioned in the fighter stream of the Indian Air Force (IAF) on 13 June 1987.
According to a press release , Marshal Tejinder Singh is a Category ‘A’ Qualified Flying Instructor with over 4500 hours of flying, an alumnus of Defence Service Staff College and National Defence College. He has commanded a Fighter Squadron, a Radar Station, a premier Fighter Base and was Air Officer Commanding, Jammu and Kashmir.
His varied staff appointments include Operational Staff at a Command HQ, Air Commodore (Personnel Officers-1) at Air HQ, Deputy Assistant Chief of Integrated Defence Staff, Financial (Planning) at HQ IDS, Air Commodore (Aerospace Safety), Assistant Chief of Air Staff Operations (Offensive) and ACAS Ops (Strategy) at Air HQ. Prior to his present appointment, he was the Senior Air Staff Officer, HQ Eastern Air Command of IAF at Shillong, Meghalaya.
In recognition of his meritorious services he was awarded the Vayu Sena Medal in 2007 and Ati Vishisht Seva Medal in 2022, by the President of India.