She did her military service in the Israeli Air Force while studying law at the Hebrew University of Jerusalem.

Upon returning to Israel, Hadar-Weingarten was a writer and editor for 17 years on the staff of the newspapers Ha'aretz and Ma'ariv, where she reported on the government and Knesset.

After her divorce she married Knesset Member Akiva Nof and later gave birth to a daughter, Ayelet.

During the 1973 Yom Kippur War, Hadar Weingarten was the first woman to cross the Suez Canal into Egypt with the Israeli Armed Forces.

To get to the front lines - ordinarily forbidden to women - she disguised herself as a man, wearing a helmet, boots and male uniform.