In her new position, Teo will be responsible for expanding Genie's offerings to mobile operators and corporations in Hong Kong.
Genie was launched by BTopenworld in January and is said to provide a single point from which broadband, narrowband and mobile customers can access online content and applications via their PCs, wireless application protocol (WAP) mobile phones and handheld devices.
Teo's scope will also involve exploring opportunities in China, according to Genie Internet (Hong Kong) Ltd in a statement today.
Prior to joining Yahoo last May, Teo was marketing director for 3Com Asia Pacific (Personal Connectivity Business Unit and Consumer Division) based in Hong Kong.
She also held marketing and management positions in Digital, IBM, Acer and IDC covering markets such as Latin America, the Middle East, Asia and Europe.
According to Genie Asia senior vice president Tim Copper, Teo is a "seasoned player with an excellent track record...we are confident she will rise to the challenges of operating in Hong Kong's dynamic and highly competitive mobile Internet arena".
To date, Genie claimed to serve 5.5 million registered users worldwide, a 41 percent increase from 3.9 million users as of end March.
Besides the UK, Germany, France, Spain, Italy and Holland, localized Asian Genie portals have been launched in Hong Kong and Japan.
Last month, Genie forged a partnership with Taiwan's Far EasTone to develop Internet services for mobile phone users in Taiwan. Genie also has an alliance with Korea's LG Telecoms to jointly develop gaming applications.
Yahoo Singapore, meanwhile, is still headed in the interim by Yahoo Asia director of production Maury Zeff.