Steward is a Starfleet Billet that is used to refer to a member of the Support Services division of the Operations department who serves food and liquor in Mess Halls and Cantinas. Officers above the rank of Commander, particularly those holding the Billets of Executive Officer or Commanding Officer, frequently have a steward assigned to them personally. Stewards rarely hold a grade higher than that of Crewman unless they are fulfilling this billet as a secondary duty.