He directed the Garbage Project[4] which was showcased in 13th Bharat Rang Mahotsava[5] (International Theatre Festival) organized by National School of Drama in 2011.
Among the cities he has worked in are Jammu, Srinagar, Mandi, Chandigarh, Guwahati, Pune, and Delhi in India; and Daegu and Tokyo in South Korea and Japan respectively.
Khanna was also involved in theater therapy programs initiated by the Rajiv Gandhi Foundation in Jammu and Kashmir for three years.
Khanna made his silver screen acting debut with Memories of Fear directed by Madhusree Dutta in 1995.
He went on to work with directors like Govind Nihalani, Milan Luthria, Shoojit Sircar, Vishal Bhardwaj, Anurag Kashyap and Tigmanshu Dhulia.
Some of his notable performances came with films like Sanshodhan (1996), Hazaar Chaurasi Ki Maa (1998), Kachhe Dhaage (1999), Charas (2004), Yahaan (2005), Kaminey (2009), 7 Khoon Maaf (2011) and Gangs of Wasseypur (2012).