Thank you Paolo, and sorry if I was not clear enough. When booting the PC, the prompt expect the password of the employee. After Shift-booting, I am able to access a Troubleshoot option, that displays a choice of "Reset this PC", "Factory Image restore" or "Advanced Options". "Reset this PC" does allow to either "Keep my files" or "Remove everything".
I am not seeing where an Admin can take over. What am I missing? Thank you for your time on this.