[3] Apart from brief periods living with his family and a failed attempt at fostering, Martin spent his childhood in institutions as a ward of the state.

He became involved in activities to break down barriers for people with learning disabilities, including protests and non co-operation with carers.

[6] By the time he was in his mid-twenties, Martin was playing a leading role in the disability rights organisation People First.

He held office at regional and national level, and in 1993 travelled to Canada to represent New Zealand at a People First conference.

[15] In the 2008 New Year Honours, Martin was appointed a Member of the New Zealand Order of Merit, for services to people with disabilities.

[16] He was promoted to Knight Companion of the New Zealand Order of Merit in the 2020 New Year Honours, also for services to people with disabilities.