He was appointed to the New South Wales Legislative Council on 24 February 2022 to fill the casual vacancy caused by the resignation of Trevor Khan.
Barrett was born and raised in the Central West region, and attended Sydney Church of England Grammar School.
He was the NSW state manager for charity group GIVIT, which provided drought, flood and bushfire relief.
[1] In March 2022, Barrett was appointed as Deputy Government Whip in the Legislative Council, serving in the role until his defeat at the 2023 election.
[5] In September 2024 Barrett was appointed to the Legislative Council to fill the casual vacancy left by Bronnie Taylor.