Foster's career had mostly been as a solo artist, but he has led some very successful bands as well including Inkase, Alcheringa, Head First and Limited Edition. He was the opening act on the Brian Cadd & the Bootleg Family Australian tour 1972-1973. He performed in The Mount Lofty Rangers.
In September 1972, was the release of Foster's award-winning debut solo album Coming Home In A Jar on the Bootleg Label.
In 1995 Forever Blue, a co-write with Graham Goble, first recorded by Little River Band in 1986 on the album No Reins, the last album recorded with John Farnham became a huge hit in Europe, rising into the Top 10.
Foster was an Australia Day Ambassador. He traveled each year to visit councils across South Australia to perform and explain what it means to be a proud Australian.