Dorothy was the alias the newspaper used for her. She wasnt leaving work though, she'd been out for dinner with friends. Article states at 12.50am she was in the nightclub. "Ten minutes later she'd said goodnight to her dinner party friends and was crossing Adelaide Terrace to her car..."Below article shows a photo of what JC's Parmelia Hilton uniform looked like. Having worked in 5 star hotels in late 80's and early 90's I can confidently state that this uniform was very standard in the industry. Indeed the uniform at the Sheraton night club (Clouds) was very similar.
The "Midnight Fear Prowls Streets" (24 June 1988) article mentions that the Sheraton attacker tied the cummerbund from the victim's dress around her mouth.
It was very common for the 5 star uniforms to also include cummerbunds seems like the Sheraton victim was wearing her work uniform.
As mentioned previously we therefore have two hotel workers, who wore similar work uniforms, one brutally attacked and one disappear in a very close timeframe - 28th May 1988 and 20th June 1988.
Both ladies also left their workplace at similar time - JC 12:30am and the Sheraton victim around 12:45am given the comments regards to the DJ/radio in the car mentioning the time being 03:45 am.