No, you do not. Elena Kagan was recently nominated and confirmed by the senate without prior experience as a Judge. William Rehnquist also had no prior judicial experience.
President George HW Bush nominated Justice Clarence Thomas to the US Supreme Court in 1991.
In 2009, President Obama nominated the first Latina supreme court justice, Sonia Sotomayor. She was confirmed in the summer of 2009.
President Ronald Reagan nominated senior Justice Antonin Scalia to the US Supreme Court in 1986. Justice Scalia will have served 25 years on September 26, 2011.
President Ford nominated Justice John Paul Stevens to the US Supreme Court in 1975. Justice Stevens retired in June 2009 and was succeeded by Justice Sotomayor.
The senate
Jimmy Carter was the only full-term president who did not have the opportunity to appoint a supreme court justice.
President John Adams nominated Chief Justice John Marshall to the US Supreme Court in February 1801. He presided over the Court until his death in 1835.
Sonia Sotomeyer is the most recent supreme court justice nominated by the president and confirmed by congress.
There are no explicit requirements in the U.S. Constitution for a person to be nominated to become a Supreme Court justice. No age, education, job experience, or citizenship rules exist. In fact, according to the Constitution, a Supreme Court justice does not need to even have a law degree.
The President. George Washington, nominated and the Senate confirmed John Jay, first Chief Justice.
Justice Hugo Black preceded Justice Lewis F. Powell, Jr., on the US Supreme Court. Black was nominated by President Franklin Roosevelt in 1937 and served on the Court until 1971.
President Clinton nominated both Justice Ginsberg and Justice Breyer to the US Supreme Court. Justice Ginsberg joined the Court in 1993, Justice Breyer in 1994. Both justices are still active.