In December 2018, Sheridan and Claire Polosak became the first pair of female umpires to stand in a competitive match in Australia, when they officiated in the 2018–19 Women's Big Bash League season.[4] In February 2019, Sheridan and Mary Waldron became the first female umpires to stand in a men's grade cricket match, during a fixture in the South Australian Grade Cricket League.[5][6] Sheridan was also one of the umpires for the 2019 ICC Women's World Twenty20 Qualifier tournament in Scotland, her first international appointment.[7]
On 28 November 2020, Sheridan and Claire Polosak were the on-field umpires for the final of the 2020–21 Women's Big Bash League season, the first time two female umpires officiated in a national final.[8] In January 2022, Sheridan was named as one of the on-field umpires for the one-off Women's Test match as part of the Ashes series between Australia and England, her first appointment at Test match level.[9]
She was one of the on-field umpires for the 2022 Women's Cricket World Cup in New Zealand.[10][11]
On 15 November 2023, Sheridan was one of the first two women, along with Claire Polosak, to umpire a Sheffield Shield match when she officiated in the match between Western Australia and South Australia at the WACA Ground.[12][13]
In September 2024 she was named as part of an all-female officiating group for the 2024 ICC Women's T20 World Cup.[14]