Donaldson's music career spans more than 40 years. He came to prominence in the early 1980s as co-founder and lead singer of new wave band H2O, which released two UK Top 40 hits in 1983 with the singles "I Dream to Sleep" and "Just Outside of Heaven". After the band's break-up, he pursued a solo career and played in a band called FourGoodMen.
Donaldson released his debut novel, ''A Rainbow in the Basement'', in 2016.
In 2018, he released his debut solo studio album, ''From Stars We Came'' on Toy Town Records. Two sold-out concerts in Glasgow
commemorated his official return to the music industry.
