Answer: The chief justice presides over the Court's public sessions and also presides over the Court's private conferences, where the justices decide what cases to hear and how to vote on the cases they have heard.How long is the term of a Supreme Court Justice? The Constitution states that Justices "shall hold their Offices during good Behaviour." This means that the Justices hold office as long as they choose and can only be removed from office by impeachment.The chief justice has significant influence in the selection of cases for review, presides when oral arguments are held, and leads the discussion of cases among the justices. Additionally, when the court renders an opinion, the chief justice, if in the majority, chooses who writes the court's opinion. The Constitution does not stipulate the number of Supreme Court Justices; the number is set instead by Congress. There have been as few as six, but since 1869 there have been nine Justices, including one Chief Justice. Supreme Court justices have life tenure, and so they serve until they die, resign, retire, or are impeached and removed from office. For the 106 non-incumbent justices, the average length of service was 6,203 days (16 years, 359 days).