This article will guide you on how to add the Our Team page in the menu of your website.
The Our Team page should already be in your list of pages. If you visit the page, you'll see the Our Team shortcode on the page which is used to display the full roster of team members you've added. Add this page to your menu.
Move the just added Our Team shortcode by draging, to where you want it to be (probably under the 'About' heading)