Each Priesthood is governed on their own with no central leader among the eleven Shrines. However, all eleven are structured the same.
High Priest - This is the highest ranking priest of the Shrine.
Elder - These are the second in command to the High Priest. A shrine may have as many or as few Elders as their congregation needs.
Priest/Priestess - A full fledged priest.
Initiate - One who is still learning to devote themselves to the priesthood.