Iamgold Corp Customer Service Phone Numbers Customer service: +1 416-360-4710   Iamgold Corp Headquarters Info, Email, Phone number, Website and live chat Information Founded: 27 March 1990 Headquarters: Toronto, Ontario, Canada Key people: Donald K. Charter (Chairman), Stephen Letwin (President & CEO) Iamgold Corporation is a Canadian gold producer headquartered in Toronto, Ontario, Canada. Incorporated in 1990 by Mark Nathanson