It's "somebody who thinks they know the answer to absolutely everything," Buechel, the CEO of Amazon-owned grocery chain Whole Foods, tells CNBC Make It. Sticking to one way of doing things, or failing to consider other people's points of view, can significantly stunt your growth and hinder your company, he adds. His top red flag for employees hits close to home, he says: He hasn't always been the most adaptable person. "And I learned the hard way that you have to be flexible, especially in today's world. Adaptable bosses can consistently adjust to their new personnel, and adaptable employees can proactively find new ways to contribute.

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Persons: Jason Buechel's, It's, Buechel, John Mackey, hasn't, Andy Jassy, Jassy, LinkedIn's, There's Organizations: Amazon, CNBC