Zimmerman is a cofounder and marketing director of Nova Ukraine, a Silicon Valley-based organization founded in 2014, the same year as Putin’s annexation of Crimea. The organization has raised more than $22.5 million in donations thus far, distributed as medical, evacuation, pet rescue and food aid. They’ve also collaborated with multiple international organizations, currently fundraising with UNICEF and collaborating with Airbnb to secure fleeing refugees with housing vouchers.