(JTA) - In the months after Russian tanks rolled into her country last February, the music largely stopped for Elizaveta Sherstuk.

The founder of a Jewish choral ensemble called Aviv in her hometown of Sumy, in the northeastern flank of Ukraine, Sherstuk had to put singing aside in favor of her day job and personal mission: delivering aid to Jews in Sumy.

"There was no time to sleep," Sherstuk recalled to the Jewish Telegraphic Agency recently. "All my team members worked the same, 24/7."

A year later, Sherstuk is still hustling as the Sumy director of Hesed, a network of welfare centers servi...