Engineers Corps Beret. ENGINEERS SILVER BERET. Each corps in the Israel Defense Forces has a beret of a different color and/or a different beret pin worn by its soldiers, independent of rank and position. Israel Defense Forces soldiers wear berets only on formal occasions, such as ceremonies and roll calls. The beret is placed beneath the left shoulder strap while wearing the service uniform (alef), but not while wearing the combat/work (bet) uniform in the field, on base however it is left to the soldiers discretion to wear his beret or a field hat. Air force and navy officers, military orchestra soldiers and military police law enforcement soldiers wear combination caps.