The city website defines this as
What does unclassified and classified employment mean?
Unclassified employees serve at the will of the appointing authority. Classified employees have grievance rights following the completion of their probationary period.
What is going on with this department? Someone please explain to me how an individual can be hired for a specifically defined position with specifically defined benefits(classified) and within a very short amount of time get a full retirement option(unclassified) and become second(first) in command.