Rainer Zitelmann (1957) studied history and political science and graduated with distinction. Zitelmann has written and edited a total of twenty-eight books, which have achieved substantial success in more than thirty languages around the world.

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Ian Ziskin, president, EXec EXcel Group LLC, has forty years of experience as a business leader, board advisor and member, coach, consultant, entrepreneur, teacher, speaker, and author. Ian has written articles, blogs, and chapters on the future of work, HR, leadership, coaching, and HR's role with the board of directors.

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Lewis H. Ziska is associate professor of environmental health sciences at Columbia University's Mailman School of Public Health. He served for nearly twenty-five years as a scientist at the US Department of Agriculture, resigning in 2019 to protest interference by the Trump administration with his research.

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Dave Zirin is the sports editor for the Nation and the author of several books, most recently Brazil's Dance with the Devil. Named one of UTNE Reader's "Fifty Visionaries Who Are Changing Our World," Zirin is a frequent guest on MSNBC, ESPN, and Democracy Now!

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Jon Ziomek is a former Chicago newspaper reporter and retired Northwestern University journalism teacher and assistant dean. He has been a freelance writer for more than forty years.

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Dr. Katherine Zinsser is an associate professor of community & prevention research in the Department of Psychology at the University of Illinois at Chicago. She studies classroom interactions, supports, and policies that impact young children's emotional well-being and the well-being of the professionals who care for them.

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William Zinsser, a writer, editor, and teacher, is the author of seventeen books, including Writing to Learn, Spring Training, American Places, and Writing About Your Life.

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Jason Zinoman is a critic and reporter for the New York Times who has written about movies for such publications as Vanity Fair, The Economist, and Slate.

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General Tony Zinni (Ret.) was commander in chief of CENTCOM and a special envoy to the Middle East before retiring as a four-star general. He is coauthor, with Tony Koltz, of The Battle for Peace and Leading the Charge.

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Howard Zinn (1922–2010) was a historian, playwright, and activist. He wrote the classic A People's History of the United States. In 2009, the History Channel aired The People Speak, an acclaimed documentary codirected by Zinn, based on A People's History and Voices of a People's History of the United States.

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Lennard Zinn was a member of the U.S. national racing team and is a lifelong endurance athlete. He has reported on major stories for VeloNews for thirty years and is the author of the world's bestselling guide to bicycle maintenance and repair.

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