[1] Marsh was born in Te Kūiti, New Zealand in 1951 and has Ngāpuhi and Ngati Hine iwi affiliations.

[2][1] He moved to Auckland to pursue a career as a carpenter, but became involved with Christian music, studied theology and lead a youth ministry.

He won a number of local awards, and eventually release his debut album, For You, in 1989.

[7] In October 2019, Marsh received the Benny Award from the Variety Artists Club of New Zealand, the highest honour for a NZ entertainer.

[8] In the 2020 New Year Honours, Marsh was appointed a Member of the New Zealand Order of Merit, for services to music and fundraising.