A longtime assistant and collaborator of veteran film editor V.T. Vijayan, T.S. Jay is known primarily for his work in Tamil cinema. He has worked with Vijayan on a number of hit Kollywood films over the years, notable among which are the action thriller Singam II (2013), the spy comedy Eli (2015), the comedy-drama Brindavanam (2017) and Singam III (2017).

In 2018, Jay helmed the editorial department in the action thriller Saamy Square, which was a sequel to the 2003 film Saamy and starred Vikram in the lead role.