Widely touted as one of the country's most talented footballers ever, Sundramoorthy is the currently the technical director of the Laos national team.

Sundramoorthy broke into the Singapore-Malaysia Cup team in 1983 at 18 years of age and in the following season became the top scorer in the tournament.

One of Sundramoorthy's most famous goals was a bicycle kick scored against Brunei in a 1993 FAM Division II League tie at the National Stadium.

In his later days, Sundramoorthy played domestically, first turning out for Woodlands Wellington in the league's inaugural year in 1996 before moving on to become the first-ever player-coach in S.League history for Jurong FC.

Sundramoorthy made several appearances for the Singapore national football team, including at the 1990 Asian Games[7] when he scored a hat-trick against Pakistan.

Sundramoorthy also represented Singapore in several SEA Games and helped the Lions reach the final in 1989 when his last-minute through ball led to Fandi Ahmad's winner against Indonesia.

[10] On 7 October 2013, Sundramoorthy announced that he would not be renewing his contract with the Football Association of Singapore to coach the Malaysian Super League side LionsXII.

He took over as head coach at second tier Malaysian Premier League side Negeri Sembilan on a two-year contract from 1 November 2013.