Edition: Enterprise
User-level: Project Manager, Director, Assistant Administrator and System Administrator
Bulk assign all all hours for one role to a staff member in the project schedule.
Organisation menu > Projects
Open the project you want to bulk assign a role on
Then Select the Schedule option
Click the arrowhead to view all resources under that stage
Click on the role under the stage
Click the toggle to 'Assign to all unassigned X roles to this project' and select the staff member from the dropdown
Select Assign