John T. Seaman

John is an accomplished author, historian, and editor with 20 years of experience as a consultant to organizations and families around the world. The founder and CEO of Saybrook Partners, a boutique communications and strategy advisor, he helps leaders capture insights from their own lived experience and use them to transform culture, brand, and strategy.

In addition to his consulting work, John has authored or co-authored histories of Brown Brothers Harriman (the private bank), the Mellon Foundation, McKinsey & Company, Boston Consulting Group, Mylan N.V. (now Viatris), Dimensional Fund Advisors, and Procter & Gamble, among others. He also has a long record of work in biography, memoir, and family history for private clients. John has a B.A. from Yale and a Ph.D. from Columbia.