Once the dominant S-League football club, with a record eight title wins, Warriors FC have not tasted championship glory since 2009.
But all that changed on Friday night when Alex Weaver's men earned the golden trophy after beating Albirex Niigata 1-0 at Choa Chu Kang Stadium and challengers Brunei DPMM went down 2-1 to Tampines Rovers at Jalan Besar Stadium.
Midfielder Hafiz Rahim provided the match-winning strike for the Warriors, when he headed home from close range in the 48th minute against the White Swans.
With DPMM tripping up, Weaver's team took the title with 53 point, three points more than the Brunei outfit.
The game at Jalan Besar also marked the end of an era for a man who gave so much to the S-League - Aleksandar Duric.
At the age of 44, the former Singapore striker is finally retiring. He was presented with a framed Tampines jersey by Stags chairman Teo Hock Seng and a Lions shirt by Football Association of Singapore president Zainudin Nordin.
After midfielder Jozef Kaplan fired Tampines into a 65th minute lead, Duric piled on the misery for DPMM when he lashed a fierce left-footed shot that was spilled onto the path of striker Miljan Mrdakovic, who gleefully tucked the ball home.
At the final whistle, a teary Duric applauded the fans and drew an end to an amazing 15 years in the S-League, which hauled in a record 381 goals, eight titles, three Singapore Cups and the Player of the Year awards in 2007 and 2008.