Lecturers within the Blackboard (Course Resources) programme/module will be brought across as Lead Tutors within the ATLAS workspace.
This will happen when the ATLAS link is added to your Blackboard (Course Resources) module/programme area and the workspace is created (see Adding ATLAS to Course Resources and setting up a workspace).
To add lecturers that have been added to the Blackboard (Course Resources) module/programme area after the link to ATLAS was created, simply click on the ATLAS link on your Blackboard content area to synch the roster between the two.