Jack Dorsey's career has had its ups and downs.
The Twitter co-founder was pushed out of his role as CEO in 2008. He then launched his credit card processing company Square in 2009, and returned as CEO of Twitter in 2015. Today, he runs both publicly traded companies.
Who you hire will determine the success of your company, he says, but, "we often obsess over the individual people that we recruit and don't spend enough time thinking about how they change the team dynamic — whether they add or detract.