medad was born to a jewish family in new york city. as a teenager, he became religious, and attended a religious high school. medad joined the betar zionist youth movement, founded by the revisionist zionist leader, ze'ev jabotinsky, in 1964. he graduated from yeshiva university with a ba in political science in 1969. in 1970, he and his wife immigrated to israel. initially, he lived in the jewish quarter of jerusalem, where he served as director of the betar students' hostel. between 1975 and 1977, he served as a betar representative in the united kingdom.