Don't have an answer to your question directly but would maybe question why you would be moving fulfiller/agent tasks into the Employee Center?

Employee Center is positioned as a front end user interface for colleagues. Appreciate you already know this, but not sure I'd be advising or see the logic in moving Agent based task fullfillment over to the Employee Center when you have the main platform UI and workspaces to accomplish this.

Looks like introducing a level of customization that could be a significant problem down the road?