Recruiter can publish position to vendor/ Employement Agency.
Vendor can see that position and upload candidate profile.
Go to hiring process and add vendor name.
1) Go to position which you want to publish for vendor
2) Click On Edit
3) On details page click On Update and Continue
4) Add Vendors/Employemnt Agency users in Hiring step
5) Click on Update and continue, for hiring process page and Open page.
6) On Publish page click on Close.
Note: If your recruiter wants to give interview scheduling rights to the vendor then add vendor in the scheduling step as well.