He was the founder and chairman of Vasanth & Co, one of the largest retail home appliance chains in Tamil Nadu.

In 1978, he started his own home appliances sales showroom Vasanth & Co, with its first store in the T. Nagar neighborhood in Chennai.

[4] Vasanthakumar and his company are credited with pioneering sales of consumer electronics goods on equated monthly installments in the Indian market, as well as centralized after-sales support.

[8] One of his campaign promises included the establishment of a Special economic zone with a hi-tech park in Nanguneri.

Vasanthakumar wrote a three part autobiographical book series in Tamil, titled "Vetri Padikattu" – (transl.

[16] President Ram Nath Kovind, Prime Minister Narendra Modi, Tamil Nadu Chief Minister Edappadi K. Palaniswami, Congress leader and Wayanad MP Rahul Gandhi, Governor of Tamil Nadu Banwarilal Purohit among others were amongst those who expressed their condolences.