Chan, has joined the agency in Hong Kong as its associate partner, while Lee will join its Singapore team as an associate on 1 September.
This follows a string of high-profile hires that Watatawa made in June, including Financial Times veteran John Burton.
The agency, which draws its name from the phrase 'Walk the talk, talk the walk', was founded last year by former Burson-Marsteller Asia-Pacific chairman, Bill Rylance.
Commenting on the appointments, Rylance said that the agency was putting together a team that combined experience in media, corporate communications and financial communications in Asia. "We're a young firm but I think our approach appeals to people who are excited about doing high-level strategic work that really makes a difference to clients," he said.
The firm currently operates in Singapore, Hong Kong and Indonesia.