New assessment vendor enrollment

Summary:

Enrollment process for new assessment vendors in ORC

Content (required):

We are currently using below vendors for assessments and I don't find their details in the marketplace. Let us know the process for new enrolments

Mentis

Mercer

Korn-ferry

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):