In April 1932, Agranat was certified as a lawyer in Palestine. After completing an internship in Jerusalem, he worked as a private lawyer. In 1940, he was appointed a judge on the Haifa Magistrate's Court. In 1948, he became President of the Haifa District Court. In December 1948, Agranat was appointed to the
Israeli Supreme Court at age 42, becoming one of the world's youngest Supreme Court justices. He presided over the Court in the
Kastner trial in 1958. From 1954 to 1966, while continuing to serve on the Supreme Court, he was a visiting professor of Criminal Law at the
Hebrew University of Jerusalem. He was appointed President of the Supreme Court in 1965, and served in this position until 1976, retiring at the age of 70. In 1974, he headed the
Agranat Commission, which investigated the 1973
Yom Kippur War. The findings of this commission led to the resignation of Prime Minister
Golda Meir, Defense Minister
Moshe Dayan, and IDF Chief of Staff
David Elazar. Following his retirement, he taught at the
Hebrew University of Jerusalem and
Tel Aviv University. ==Awards and commemoration==