Starting five separate businesses has taught WeWork co-founder Adam Neumann a thing or two about hiring.

While the 36-year-old entrepreneur can't hire everyone himself--WeWork has 350 employees that rent out office space to startups in more than a dozen U.S. cities--he has extreme confidence in WeWork's entire staff. Part of this confidence comes from having a great HR person, but it also has to do with the way WeWork approaches new hires. When the company interviews prospective employees for an open position, as many as five current employees will sit in on the interview.  

"All of them have to say yes," Neumann says, adding that when disagreements come up, co-workers have to hash it out until there is a unanimous decision. 

Using this process--along with three month trial periods for new employees--is how WeWork ensures it only hires great candidates. 

"You should usually know in three months if a person is the right fit," Neumann says. "Sometimes we're not a fit to them. A good fit comes from both sides."

To hear more of Neumann's hiring tips, check out the video below.