In the late 1950s, Nelsson was in a band called The Cagey 5 which was a tiwst around of the name of their school King George V. In a few years the band had become The Kontinentals.
In 1963 Nelsson's school band The Kontinentals, signed their first recording contract and shortly afterwards released I Think Of Her and I Still Love You, released on the Orbit Records label. Both were chart-topping hits in Hong Kong.
In the 1970s, Nelson was the front man in a successful band called Ming which was signed to EMI records. It was formed in 1973 and lasted until 1976. Most of the recordings the band made were composed by Nelsson. Some of the band's releases that did very well in the 1970s included "Never Coming Home" and "Reasons Why". Due to a few things he'd seen with other bands that included drinking backstage and taking drugs, also not wanting to sing past 30, he decided on a change of direction and as a result, he broke up Ming.
In 1976 he switched to composing and producing and has written many jingles and film soundtracks, including the main theme for the award-winning Cantonese movie Mr. Vampire.
From 1976 to 1979 he worked for EMI (HK) Ltd as Artist & Repertoire Manager and in 1979 started his own group of Companies, The Melody Bank which became a successful production and publishing house, and The Entertainment Company, which managed several successful Hong Kong artists, including Rowena Cortes and Louie Castro.
10 years later he sold The Melody Bank to BMG Pacific Limited and joined this newly emerging ‘major’ in the music industry as Managing Director.
In this role he set up BMG’s music publishing operations in the Asian Region as well as running the record company in Hong Kong.