In an interview with the BBC's Business Daily this week, Okonjo-Iweala pointed at her over 30 years of experience negotiating important agreements between countries as one of the qualities that qualifies her for the job.
She touted the trade organisation as relevant for the world's economic development and growth, and for sharing of prosperity on a global scale.
"I want the job because I think I have the skills for it.
I think that this organisation needs reforms to make it relevant for the times that we're in and make it fit for purpose.
And I have a reputation as a strong reformer," she said.