[1][3] After the German invasion of Poland, Grundman's family went into hiding with a Polish farmer near the town of Proszowice.
[3] At the end of the war, Grundman's father returned to work in the flour business and owned a small bakery.
[3] The Grundman's shared profits with the Polish farmer and before making aliyah to Israel, they gave him their business and two houses.
The peak of his managerial career was when ha, alongside Itzhak Schneor had jointly coached Israel between 1988 and 1992, and were one goal short of qualifying for the 1990 world cup.
[4] On 27 March 2004, three days after Grundman's death, the Israel national team held a moment of silence for Yankeleh before their friendly match against Georgia in Tbilisi.