Having maintained a clean sheet of 576 minutes in the 1984 tournament, he holds the Indian record.

He inherited the love for football at a young age from his father Seguna Sankhwalkar and their family doctor Alvaro Pinto, with the latter telling Sankhwalkar stories about famous goalkeepers and showing him the basic football techniques.

His elder brother Vallabh, a footballer played at the local Panvel Sports Club.

In 1974, as a 21-year-old, he captained the team to its first Bandodkar Gold Trophy win, beating SESA Goa 2–0 in the final.

It reached the final of the Federation Cup in 1987, eventually losing 0–2 to Mohun Bagan.

The following year, the team won the Sait Nagjee Trophy beating Mohammedan S.C. in the final.

His career with Salgaocar ended in 1991, following which he signed with Churchill Brothers, another Goan club.

[2] Following his impressive performances with the Panvel Sports Club, Sankhwalkar was picked to play for the Goa state team in the 1974–75 Santosh Trophy in Jalandhar.

They faced Punjab in the finals in Madras (now Chennai), beating them 1–0, to win its first Santosh Trophy.

Sankhwalkar finished the tournament without having conceded a single goal, and for 576 minutes, a record.

[2] Following a few international tour games, he was made the captain at the Nehru Cup in 1983 and led the team till 1986.

Following his career as a player, Sankhwalkar completed the AFC A, B & C license exams to qualify as a coach.