Simone McAullay's first major television role came in 2003 when she joined the cast of the Australian police procedural "Blue Heelers," playing the role of Constable Susie Raynor for four seasons. Her involvement in police procedurals continued, and most fans of English-language police dramas probably recognize McAullay best from her role as Becca Fisher on the underrated ITV series "Broadchurch," which stars Olivia Colman and David Tennant as two police detectives tasked with solving a murder in a seaside town in England.

Becca Fisher is a Broadchurch resident and Australian transplant who runs the local Trader's Hotel. Early in the season, she gets in trouble with the law for trying to purchase cocaine for Chloe Latimer (Charlotte Beaumont), whose younger brother Danny (Oskar McNamara) is murdered. On top of that, she's having an affair with Chloe and Danny's father Mark (Andrew Buchan). When this is discovered, it provides Mark with an alibi but also ruins his marriage to Beth (Jodie Whittaker). Becca also shows up during Season 2 to attend the trial of Danny's killer, Joe Miller (Matthew Gravelle). 

During this period, McAullay also made guest appearances on British TV series like the firefighter drama "The Smoke," the workplace sitcom "The IT Crowd," and the medical drama "Holby City." Otherwise, McAullay's TV credits include voicing the tavern owner Alisa on "Cowboy Bebop," as well as acting in Australian TV shows like the police drama "The Strip," the soap opera "Home and Away," and the science fiction climate change series "The Commons."