The nine Justices of the United States Supreme Court, as of January 2015, are John Roberts, Antonin Scalia, Anthony M. Kennedy, Clarence Thomas, Ruth Bader Ginsburg, Stephen G. Breyer, Samuel Anthony Alito, Jr., Sonia Sotomayor, and Elena Kagan. John Roberts is the Chief Justice and the others are Associate Justices.
Justices are nominated by the President of the United States and must be confirmed by the Senate. In the United States justice system, the Supreme Court is the highest legal authority. It has appellate jurisdiction over all federal cases and cases arising under the United States Constitution. The only types of cases in which the Supreme Court has original jurisdiction are ones involving ambassadors, other public ministers and consuls, and those in which a state is a party.
Article Three of the Constitution provides that Supreme Court Justices hold their offices during good behavior, meaning they cannot be removed from the job except under extreme circumstances. The only Justice ever to be impeached was Associate Justice Samuel Chase in 1805, but he was acquitted by the Senate.
The Constitution does not require specific qualifications for Supreme Court Justices. A Justice does not need to have graduated from law school, but all Justices have some type of legal training.