She will expand her responsibilities to cover all the creative aspects of Publicis Groupe in Hong Kong, effective immediately.
"The UK has to become a tax-light and a regulation-light economy which is attractive for businesses."
Notable brands in the Ferrero family include the likes of Nutella, Ferrero Rocher, Kinder Bueno and Tic Tac.
Chen will be responsible for driving strategy planning and transformation of the Groupe across the span of its thirteen agency brands.
Maxis first called for an integrated pitch review in February, as it aims to transform into a strong converged player in Malaysia for both fixed and mobile.
This comes after IPG Mediabrands was appointed to handle above-the-line duties earlier this year.