The Dentsu Aegis shop has been tasked with developing a digital platform for Western Union’s campaign around Chain of Betters.
The pitches took place in February and there was no intermediary involved.
In November last year it began a campaign to "kick-start a chain of selfless good deeds around the world" by donating $1,000 for project ideas.
For International Women’s Day this week the company announced that it was sponsoring Siba Gqirana who wants to become one of South Africa’s first female commercial pilots.
Mcgarrybowen handles above the line work for Western Union. In 2012 the company had worked with 180 Amsterdam to create a global campaign featuring Patrick Vieira, the former Arsenal footballer.
Muriel Lotto, the vice president for global marketing strategy and brand management at Western Union, said: "Isobar’s strong strategic thinking and collaborative culture, combined with its digital capabilities, will be key to helping us evolve the Chain of Betters programme."