Many organizations clearly differentiate between system administration
and application administration. For example, the Windows 2003 Server
and SQL DB would be handled by the system admins. The application
admin would admin Project Server and PWA and would maintain a close
relationship with the system admins, to include, hopefully, the ability
to log into the server in at least a read only mode to see the logs and
settings.
The application admin for Project Server and PWA should know Project
well, but doesn't need to be an expert. They should know project
management very well. The typical responsibilities are:
Collect requirements
Implement the system and changes, including establishing the ERP,
Custom Fields and Outline Codes, Views, and Analyzer Views. Set up
Groups and Categories for security permissions.
Document the system
Admin the system - admin users, ongoing security
etc.
I would say the person should have a good mix of functional experience
with technical experience or a group of technical people he or she can
work with. Functional is probably more important.
Hope this helps.
Mark