Assign specific user to role on all project tasks

I've got a template set up where I have several tasks assigned to a Designer, Brand Manager, or Copywriter. Is there a way when setting up the template to easily replace all of the Role placeholders with a specific user? I've seen this before on Workamajig, but I can't figure it out on Workfront. Seems like I'd have to bulk edit the tasks in question (which wouldn't work very well with tasks that have multiple assignees). Seth Skinner Focus Brands