He has worked at JWT, Grant Kenyon & Eckhardt and as senior creative director with RK Swamy BBDO.
He was one of the first small-screen stars in India featuring in the 1980s TV serials like Khandan, as well as an appearance in the horror anthology series Aahat as a vampire, Mr. Mrs and later in Ji Mantriji (2003), the Indian adaptation of BBC's satirical sitcom, Yes Minister.
[8] Jayant has played character roles in movies like Heat and Dust (1983) directed by James Ivory, Rockford, in the Indian sci-fi thriller Alag, in the 2008 blockbuster Jaane Tu...
Jayant has written the scripts for the original Ghar Jamai which was aired in the old TV days of Doordarshan.
Amongst his earlier work is an educational TV programme in which children explored the statement "Why is Water Wet!"