To invite coworkers, go to Company profile > Edit & scroll down to the bottom:
Click on 'Add Contact' button. A pop-up appears that allows entering contact details. Once the info is saved, it triggers a mail to the contact to join the team.
Once this contact joins the domain, the contact will appear in the contacts list.
When a viewer is observing some other user's company profile, contacts section will display all the contacts.
'View All Contacts' should display the list of all contacts.