Sekar made his professional debut in the I-League with Chennai City on 19 February 2017 against Shillong Lajong.

He scored the equalizing goal for Chennai City in the 57th minute which eventually led to the team winning 2–1.

[2][3] On 17 August 2022, Sekar scored a stunning goal assisted by goalkeeper Lalthuammawia Ralte in the season opener against NorthEast United in the Durand Cup, which ended in a thumping 6–0 win.

[6] He made his international debut for Indian U23 national team in a friendly against Singapore U23.

[citation needed] After his successful domestic spell with Odisha, Sekar was called up to senior national team in May 2023, for Hero Intercontinental Cup and SAFF Championship.