Custom Field for Position Description

Hi,

Is there any option to add a custom field for HR new hire trigger request which will hold the position description?

I have reviewed the SAP note 2036022 - GRC AC 10.0 - How to create custom fields?

Since the position description is a dynamic field which depends on the position assigned to the user, I wasn't sure if this is feasible or if there is any other option I can pursue.

Thanks,

Jay