[2] Before entering politics Kirby was a small-business owner, operating the ‘Good Egg Studio’ within his current electorate,[3] and was the Vice President of the North West Business Chamber.

[1] In 2023, Kirby was preselected as Labor's candidate for the marginal seat of Riverstone for the 2023 state election.

He defeated the Liberal candidate Mohit Kumar with 53.7% of the two-party-preferred vote, a swing of 9.9 points, to succeed the retiring member Kevin Conolly.

[2] On election night federal member for Greenway (which covers part of Riverstone) and former ALP NSW branch president Michelle Rowland commended Kirby on his campaign.

[4] This article about an Australian Labor Party politician is a stub.