Military attaché
During the Sinai War, Vardi served as the Deputy Commander of the Reserve Division. Between 1957 and 1960, Vardi served as a Military attaché in Burma and Thailand. From 1960 until 1962 he served as the Chief Military Police Officer. Vardi later served as an instructor in the National Security College from 1962 until 1967. During that time, Vardi received his Bachelor of Laws from the School of Law and Economics. In 1966 he became a lawyer.