Born in Austria, he came to Canada as an infant. His singing and performing began in high school in Toronto, but after graduating he returned to Europe where his music career began. In 1966 he formed the successful but short-lived folk singing group, Jack's Angels who were signed to Amadeo Records of Vienna, Austria. After the group disbanded, Grunsky recorded three solo albums for the label, one of which was produced by Alexis Korner. The album, "Toronto", was recorded in London and featured tracks with Mick Taylor on slide guitar.