Under User Profile please create Employee ID field under the Title Field
Hi @dkiwak, you can add the Employee ID field on the user via custom fields, custom forms, and dynamic form rules. This and other custom fields will be displayed at the bottom of all the system fields. SWSD Custom Field, Custom Form, Dynamic Form Rules Documentation
Let me know if this resolves this ask.
I would like to see this added to the core product as well. The linked instructions were not helpful