In 1948, when the State of Israel was founded and the IDF (Israeli Defense Forces) was formed, Imi became chief instructor for both physical fitness and Krav Maga at the IDF School of Combat Fitness. He served in the IDF for about 20 years, during which he developed and refined his Krav Maga system.
After he finished his active duty, Imi had a vision to extend his teaching beyond military use, and he began adapting and modifying Krav Maga to civilian needs. He felt that all people had a right to safety and security, and he worked to make the gift of Krav Maga training available to everyone.
Imi passed away on January 9, 1998 at the age 87. Today, his legacy lives on as his successors at International Krav Maga continue to spread his teachings throughout the world.