Along with his medical education, he has a legal degree, which has led him to be involved in the administration of not-for-profit organisations.
[1][2] Miller was first elected to be president of the AMA (WA) in June 2016, having been vice-president for the previous two years.
[4][5] In July 2019, he was elected president of the AMA (WA) again,[5] and was re-elected the following year.
[6] As AMA (WA) president, Miller has praised the Western Australian Government's handling of the COVID-19 pandemic[7] and criticised the government for failing to learn from hotel quarantine breaches in other states, which has led to breaches in Western Australia.
[8] He has also called for Health Minister Roger Cook to resign after a seven year old died after failing to receive medical help at Perth Children's Hospital's emergency department for two hours.