The agency was brought on board by Standard Chartered Bank to promote its marathon relay challenge which is in its fifth year.
The challenge consists of men's and women's teams competing for a share of the US$ 1 million prize fund, one of the largest guaranteed prize pools in world athletics.
Capitalize will promote the involvement of 36 national teams from 24 different countries taking part in the four-leg series that encompasses marathons in Nairobi, Singapore, Mumbai and Hong Kong.
The agency will be responsible for promoting the race across more than 70 countries in which Standard Chartered operates.