Adding a Profile field that only admins can edit

Hello,

Sorry if this is a dumb question, but I can't seem to find an answer anywhere. Anyway, I wanted to know if there's a way to add a profile field that only administrators could change. I want to add a points field that starts at 0 when people register that admins could edit later when they fulfill certain requirements outside of the website.

Thanks in advance,
Tiuya