John Koob is a Partner and Senior Deal Advisor at Mercer, specializing in corporate transactions in North America and globally. Based in New York and Atlanta, John focuses on mergers, acquisitions, divestitures, and other large complex transactions, supporting clients on both buy and sell-side. With over 25 years of international leadership experience, John has led and supported more than 100 transactions, primarily of multinational scope, across various sectors including pharmaceuticals, telecommunications, and financial services. Prior positions include leadership roles at Mobil Oil, Mylan Pharmaceuticals, and Towers Perrin, contributing to broad market development and human capital management. John studied at Cornell University.
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