 Mongia has spent many years as India's second successful wicket-keeper after Kiran More, Mongia made his debut in the Indian international cricket team in the mid-1990s and from there, he was considered as India's number one choice as a wicketkeeper.Mongia scored his maiden Test century against Australia in the one-off Test during the latter's tour of India in 1996–97, in Delhi.Opening the batting, he scored 152 on a "slow turning wicket of low bounce".