Miss Earth Australia organization hosted the 2022 edition of the national pageant on 4th September 2022 at Hyatt Regency, Sydney where Sheridan Mortlock was crowned Miss Earth Australia 2022. She has studied Global Sustainability and Politics.
In the pre-pageant competitions, Sheridan has won Miss Congeniality in fire group. She also won bronze medal in the fire group at Beach wear competition, silver medal in Asia & Oceania group in Swimsuit competition, also won Darling of the Press in Asia & Oceania category.