System administrative user - SYSADMIN or SYSADM

We have scheduled procedures to be run monthly, end of year, etc. The problem is that the procedures are created by active users and their names are a part of the stored procedure. If something should happen, and the creator's userid is no longer active, the necessary procedure will abend.

How can one create a system administrator or SYSADM user, who has the same characteristic as SAP*, where the user id will not expire?

I appreciate your help.