Imman was born to J. David Kirubakkara Dass, who was a teacher. He attended Don Bosco, Egmore, Chennai and later Pachaiyappa's College. He received his Master's degree from the University of Madras. He married to Monica Richard on 24 April 2008. They have two daughters, Veronica Dorothy Imman and Blessica Kathy Imman. He began work on music for films aged 15, apprenticing under music composers Mahesh Mahadevan and Adithyan by playing the keyboard. During the period, he also worked on private albums and his work was noticed by television serial producers Kutty Padmini and Prabhu Nepal, who gave him the opportunity to work on the theme song and background music for their drama Krishnadasi, which began running in 2000. He subsequently began to get further work in the television circuit, garnering opportunities to score music for over 5000 episodes in shows including Kolangal, Police Diary and Mandhira Vaasal. Kutty Padmini then gave him the chance to score music and compose songs for his first feature film, Kaadhale Swasam, a romantic film featuring Karthik and Meena. However despite a grand audio launch in November 2001, the film failed to have a theatrical release. Producer Venkateswaran, was impressed with Imman's work in the album, and gave him the opportunity to compose the music for Thamizhan, the album won positive reviews. Despite the success of individual songs such as "Azhagiya Asura" from Whistle (2003), he failed to garner offers for big films. His next successful album was for Sundar C's masala film starring Arjun, Giri. The positive reviews that his work in Prabhu Solomon's Mynaa (2010) received, coupled with the film's box office success prompted bigger offers for Imman. He has subsequently collaborated with Prabhu Solomon for the rest of his trilogy of romantic films, earning acclaim for his work in Kumki (2012) and Kayal (2014). Similarly he has struck a similar successful combination with director Suseenthiran, winning positive reviews for his work on Pandianadu (2013) and Jeeva (2014). For the first time, he is conducting his own concert in Malaysia. His upcoming projects are Thodari, Faisal, Bhogi, Panjumittai, Meen Kuzhambum Mann Paanaiyum, Adhagappattathu Magajanangalay, Kalukkuray Maaplay, Naan Thaan Siva, Veera Sivaji, Wagah and Mudinja Ivana Pudi. He is also a singer and the songs sung by him includes Verasa Pogayile - Jilla, Muttaalaai Muttaallai - Yennamo Yedho, Oru Nodi Piriyavum - Rummy, Yennama Ippadi Panreengalema - Rajini Murugan and so on.