Which of the following is NOT a Cabinet-level position?

The Chief Justice is the head of the Supreme Court and is not part of the President's Cabinet, which is composed of the heads of the executive departments. Cabinet-level positions are typically responsible for advising the President and managing their respective departments, such as agriculture, commerce, and defense, which directly deal with government policies and administration. While the Chief Justice plays a critical role in the judicial branch of the government, their responsibilities and functions are distinct and separate from the executive branch, highlighting why this position does not belong to the Cabinet.