Vishwanath started his career with a minor role in Singam (2010) before playing an anti-hero in S. A. Chandrasekhar's Veluthu Kattu (2010).
He then portrayed small supporting roles in films including as Arun Vijay's friend in Thadaiyara Thaakka (2012), as Dinesh's elder brother in Attakathi (2012), and as Prakash Raj's neighbour in Dhoni (2012).
Portraying a Chennai-based gangster hired to protect Rajinikanth's lead character, the film and his role won acclaim.
[3] The high-profile nature of the film prompted several film makers to sign him on for their productions, and notably later worked on Sketch (2018) alongside Vikram and Linguswamy's Sandakozhi 2 (2018), portraying the husband of Varalaxmi Sarathkumar's character.
[3][4][5] He also worked on a Hindi-language film as well as portraying his first lead role in the horror-comedy, Onaaigal Jakkiradhai (2018).