Religious officiants, commonly referred to as celebrants, are usually ordained by a religious denomination as members of the clergy, and charged with conducting worship services and other religious ceremonies. Some officiants work within congregations in some denominations and for specified ceremonies (e.g., funerals) as non-ordained members on the clergy team. Clergy or officiants differ from chaplains in that the clergy serve the members of their congregation, while chaplains are usually employed by an institution such as the military, a hospital or other health care facility, etc.