In addition to his managerial responsibilities at the Institute, Bloch contributed a great deal to numerous emerging organizations and establishments of " Ha-Yishuv " (the Jewish National Council in the British Mandate Palestine) and later, of the young state of Israel. He was a board member of Magen David Adom (Israel's emergency medical service) and of the Israel Maritime League. He also was active in the National Defense Committee and in the Haganah. He was a member of National Emergency Committee and also took upon himself the duty of heading the Palestine Air Raid Precautions (A.R.P.) and the Civil Guards in his own town, Rehovot.