PARIS & NEW YORK--(BUSINESS WIRE)--Lazard Ltd (NYSE:LAZ) announced today that Dr. Ngozi Okonjo-Iweala has joined the Firm as a Senior Advisor, with a focus on sovereign advisory. Dr. Okonjo-Iweala, a global leader in economic development and international finance, was until May 2015 the Coordinating Minister for the Economy and Honourable Minister of Finance of Nigeria. “Dr. Okonjo-Iweala has built a remarkable international reputation over more than three decades in leadership positions in gov