What are the various positions or titles for student government?

The senior class president has already picked his cabinet members, but I am sure that there is a title that no one else has. I want to be a member of student government at my high school. I am a well-rounded student and I can complete nearly any task necessary. Can you please just list the various duties, titles, and responsiblities that can be fulfilled?

"student body organization"

pres

vpres

sec

treasurer

auditor

business mngr

peace officer

representatives from each yr level

There is Student Body President

Student Body Vice Pres

Class Pres

Class Vice Pres

Class(I think, may be Body) Treasurer

and Class Reps.