The Australian-born Ringer has a CV which includes time at JWT Thailand and Batey in Singapore. Recently, he was freelancing at Saatchi & Saatchi Singapore.
The TBWA\Hong Kong chief executive, Ian Thubron, said: "The advertising industry in Hong Kong has not enjoyed the highest of creative reputations in recent years, so to attract someone of Mark's talent and experience means a lot."
Ringer said: "I'm excited to join the TBWA\ fold. Its success is based on the power of its ideas and creative product. To be entrusted with that in one of the key markets in the region is an honour."