[5][6] In 2024, he successfully led the West Bengal football team to victory in the Santosh Trophy, securing their 33rd title in the prestigious tournament's history.

After his first season in charge he led Prayag to an eighth-place finish out of fourteen teams in the I-League.

Mohammedan Sporting had appointed Sen as their new head coach for the remainder of the 2012/13 season.

Sen's aim for the rest of the season was to gain promotion with Mohammedan Sporting to the I-League from the 2nd Division.

He also won 2015–16 Indian Federation Cup as Mohun Bagan defeated Aizawl in final.