DetailsBus services in the Glenorie area commenced in the 1920s when George Deaman began operating. In 1952 Deaman sold out to Roy Baxter and George Tucknott. In 1975 the business was sold to Laurie and Keith Todd with 16 buses. In April 1988 Dural Busways was purchased.
In December 2001 Glenorie was purchased by National Express but the business was not merged with its neighbouring Westbus operation. Instead it operated on its own until December 2004, when Glenorie, along with Westbus' routes that operated out of Seven Hills and Northmead depots, were all rebranded Hillsbus.