Employee Self Service Leave Approval - Workflow

Hi MOSC,

When employee submits Leave request in P07620, An email is triggered to Supervisor and after supervisor's approval, leave is considered approved and an email is triggered back to employee confirming leave approval.

How can we add one additional approval of HR Manager/Administrator after Employee Supervisor approves leave request.

Desired workflow

Employee -->  Supervisor -->  HR Administrator --> Employee

Is there  any standard way or I have to modify the workflow ? Can anyone name the workflow attached to leave request.

Many Thanks

Jameel