Gravitas is in expansion mode with the appointment of Napoleon Biggs from Fleishman-Hillard Asia Pacific as chief strategy officer.
Biggs will join the local mobile agency's top management at a group level, overseeing the development of both Gravitas and AMAZE Mobile Media across the region.
Ricky Chu, managing director of Gravitas, said the agency is in the process of "a huge regional expansion and restructure" and has been looking for experienced talent.
He said Biggs has worked with Gravitas previously on a number of projects and having him on board is "very encouraging" for the whole company.
"It says a lot on how much potential he sees in the mobile marketing industry in Hong Kong."
Chu said Gravitas currently has a team of 60 and is planning to expand to more than 100 in the next six months.
Biggs was with Fleishman-Hillard previously as senior vice-president, head of digital integration. He will start at Gravitas in early October.