“Mark Gruen served as a trusted advisor to me in my position as an Executive Vice President responsible for the sales force in 210 countries and territories at MasterCardWorldwide over a thirteen-year period. Mark and I originally began working together when I was a Senior Vice President and Credit
Card Executive at KeyBank in Cleveland, Ohio. Mark and I have worked together for many years and I have been fortunate enough to engage Mark Gruen's firm Gruen + Sells to build direct marketing programs that were highly successful in building our credit card portfolio. Mark is a creative master at developing and executing marketing solutions. I have found Mark to be highly intelligent, skilled and a resourceful executive who is always responsive, honest and frank.”
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Valarie Gelb, EVP MasterCard International