Tsang will be responsible for the day-to-day management and operation of the Kensington venue's busy event spaces, including the clubhouse and one-and-half-acres of themed gardens.
Tsang joins the venue having gained experience at some of the world's most well-known venues, including the Stratosphere Hotel & Casino in Las Vegas, Hilton London Metropole and Harrods.
"We are delighted Annie has joined The Roof Gardens and feel sure her passion and client understanding will contribute greatly to the continued success of the business," said general manager Jason Goddard.