Register using the 'Register Here' box and then login using the 'Login' button using your username/password. Once you are logged in you can create your profile and then do a search.
Search profiles as per your criteria using search box. You can see their basic infomation and if it meets your requirment you click on the 'Express Interest' link.
If your 'Express Interest' request is accepted, then you can see their contact details. You can now contact them and set up a meeting to take it further.