The 18-year-old has been signed as the U20 player for the senior team for the upcoming season.
The left-back has joined the Golden Eagles from Sesa Football Academy, where he spent four years.
Shortly after completing the move to Dempo SC, Assumption said, “ I am very happy to join Dempo SC and I’ll give my best to for the club,”
“The team have many great players and I’ll have to work very hard to earn my place in the squad,” added Assumption.
The left-back had an impressive run for Dempo SC U-21 team in the Bandodkar Gold Cup wherein they emerged runners-up.
Assumption was part of Calangute Association in the Goa Pro-League, making 9 appearances in the 2015-16 season.