Cisco’s top exec and Amazon’s Andy Jassy share the same hiring red flag—and it’s something that can’t be taught

• Amazon CEO Andy Jassy says a good attitude and enthusiasm are key to success, especially in your twenties—and Cisco’s U.K. chief exec agrees.

It’s not what you know, or even who you know. According to Cisco’s new U.K. chief, your next promotion might hinge on your attitude.

“You cannot teach positive attitudes and engagement and energy,” Sarah Walker tells Fortune. That’s the No. 1 green-flag trait she keeps an eye out for when hiring or looking to promote from...