After his schooling, he did his B.Sc. and Post Graduation in Physics, thereafter he did his MBA from Institute of Management Technology, Ghaziabad, India. During his MBA education he decided to make his career in advertising. He started his career with Ogilvy & Mather (O&M) Delhi, and after working there for over 10 years, he joined McCann-Erickson, in early 2002. By 2006, he was Regional creative director, South and South East Asia, when in December 2006 he was elevated to Executive Chairman for McCann Worldgroup India and Regional Creative Director Asia Pacific.

[4] He made his debut as film lyricist with Rajkumar Santoshi's Lajja, which soon led to Yash Chopra's Hum Tum and a string of popularBollywood films, Fanaa, Rang De Basanti, Taare Zameen Par, Black and Delhi 6. With Rang De Basanti (2006), he also became a dialogue writer.[5] Prasoon has also created many advertisements like NDTV India ("Sach dikhate hain hum"), Saffola ("Abhi to main jawan hoon") LG, Marico, Perfetti (Alpenliebe, Chloromint), and the thanda matlab campaign for Coca Cola with Aamir Khan, Happydent -which is considered by experts as India's best ad till date, he has rightfully earned the title of "The Ad Guru of India".

[1] In 2006, he was chosen a 'Young Global Leader 2006' by the Forum of Young Global Leaders, an affiliate of the World Economic Forum,[6]and in 2007, he appeared as judge of reality singing competition Dhoom Macha De on NDTV Imagine.[7] In 2008 he was invited as the Cannes Jury Chairman and in 2009, he was named amongst the exclusive 10-member Cannes Titanium & Integrated Jury 2009 at the Cannes Lions International Advertising Festival 2009.[8]