Krolis started singing at a young age; he formed The Rhythm Makers with Bertje Tjin A Kwie, André Stekkel and producer-to-be Stan Lokhin.
Their repertoire of kaseko, calypso, soul, merengue and reggae earned Krolis a residency at the local Torarica Hotel's Saramacca-bar.
Krolis settled in Rotterdam where he formed Caribbean Combo;[2] the other members were his brother Robby, John Kembel, Ricardo Tjon A Kon, Lesley Leeflang, and August Cabenda.
A debut-album followed in 1979; Switie Bamaro consisted of ten new recordings[2] including cover-versions of The Blues Busters' Wide Awake In A Dream (translated in Surinamese) and Eddy Grant's Say I Love You.
[1] In 1986, Krolis got involved in a car crash that left him disabled and practically deaf; he secluded but managed to record one more album; Biegie Famier' Mang, produced by Lesley Leeflang and released in 1995 to positive reviews.