He has frequently collaborated with Amal Neerad, M. Rajesh, and Karthik Subbaraj since the beginning of their careers.
Big B (2007), Jigarthanda (2014), Iyobinte Pusthakam (2014), Iraivi (2016), Varathan (2018), and Bheeshma Parvam (2022) are some of his notable works.
He won the National Film Award for Best Editing in 2014 for Jigarthanda.
[1] After assisting editor Anthony, Harshan started working as an independent editor with the Malayalam film Red Salute (2006).
[citation needed] His work on the 2014 Tamil film Jigarthanda got him the National Award for that year.