He studied at the Sardar Patel Vidyalaya in New Delhi, where he played cricket until eighth grade before his physical education teacher suggested he switch to high jump.

[7] In January 2018, Shankar broke Roy's indoor national record with a mark of 2.18 metres, and then bettered it by a centimetre the same month.

Shankar, who was not initially selected in the 2022 Commonwealth Games contingent despite meeting the qualification standard, took the Athletics Federation of India to court and was later brought in as a replacement.

He then bettered the decathlon Indian National Record by 6 points in October 2023, to finish second at the 2022 Asian Games, earning a silver medal.

In February 2024, he won gold at the World Athletics indoor tour challenger, the high jump gala at Elmos 2024 in Belgium.