Moriarty was Chair of Club Plus Superannuation and Secretary/President of the Liquor and Hospitality Division of UV prior to her election.[3] She has been Senior Vice President of NSW Labor and a member of the ALP National Executive.
Upon her election in 2019, Moriarty was immediately appointed to the shadow ministry, serving as the Shadow Minister for Mental Health and Crown Lands. She served in this role until Jodi McKay was replaced as Leader by Chris Minns in 2021.[2]
In 2021, she was appointed Shadow Minister for Corrections, Juvenile Justice and Medical Research in the shadow Ministry of Chris Minns. Following Labor's victory in the 2023 New South Wales state election, Moriarty was appointed Minister for Agriculture, Regional New South Wales and Western New South Wales in the Minns ministry.[2]
