Rosenberg was born on May 12, 1918, his family a poor Eastern European Jewish foreigners living on New York City’s Lower East Side. After he graduated with a degree in electrical engineering in 1939, according to the FBI, he joined the Communist Party—he married Ethel Greenglass.
In 1940, Julius began working as an engineer in a civilian position with the U.S. Army Signal Corps, a job from which he was fired from in 1945 on the grounds that he had covered up his membership in the Communist Party. Him getting fired from the Signal Corps occurred after the FBI sent U.S. Army Intelligence evidence of his membership party. Moreover, FBI advisors who crashed the party reported that Julius and his wife were active members in the 1940s. After his
In 1940, Julius began working as an engineer in a civilian position with the U.S. Army Signal Corps, a job from which he was fired from in 1945 on the grounds that he had covered up his membership in the Communist Party. Him getting fired from the Signal Corps occurred after the FBI sent U.S. Army Intelligence evidence of his membership party. Moreover, FBI advisors who crashed the party reported that Julius and his wife were active members in the 1940s. After his