Zackheim's early editorial career included positions at HarperCollins, William Morrow, Doubleday, and St. Martin's Press.
[1] Zackheim worked for HarperCollins from 1994 to 2001 before joining Penguin Group in September 2001.
[5] At Portfolio, Zackheim has published bestselling books, such as Purple Cow: Transform Your Business by Being Remarkable by Seth Godin, Start With Why by Simon Sinek, and The Smartest Guys in the Room by Bethany McLean and Peter Elkind.
There, he has published George Washington’s Secret Six by Brian Kilmeade and Don Yaeger; and Do the Right Thing and A Simple Christmas by Mike Huckabee.
[6] He has edited many bestsellers including Good to Great by James C. Collins, The Dilbert Principle by Scott Adams, and The HP Way by David Packard.