What do you call it?

President: President
Vice President (the one who takes over for the prez if necessary) - 2nd Vice President
Recording Secretary - Secretary
Treasurer - Treasurer
Person in charge of rituals - the person in charge of the ritual materials is the Warden. Managing of ritual is handled by the President, 1st VP, and 2nd VP
Person who plans rush - 1st Vice President
Person who guides the pledges 1st Vice President

Our executive offices are:
President
1st VP (recruitment)
2nd VP (membership, alumnae chair)
Secretary
Treasurer
Music Director

We also have (as non-exec offices)
Warden
Chaplain
Parlementarian
Correspondence Chair
Historian
... and another one I can't think of right now