He was introduced in Kathir's 1999 romantic Tamil film Kadhalar Dhinam, alongside Sonali Bendre, a popular Bollywood actress that time.

After co-starring with Manoj K. Bharathi in Varushamellam Vasantham (2002), Kunal then appeared in many flops like Pesadha Kannum Pesume, Enge Enadhu Kavithai and Unarchigal.

[1][2][3][4] Moreover, two films which he had signed opposite actress Sherin Shringar, Jai Adithya's Kadhal Thiruda and Nanda's Thodu, were shot and unreleased.

The apparent suicide was challenged by his father Rajendra Singh who claimed that the body showed signs of suspicious bruising.

At the time of his death, Kunal was working on a Hindi film, Yogi, which was being produced by his newly formed production company Balagiri.