His father was Raul Wallach, a Polish Holocaust survivor and a member of the Jewish underground during World War II.

[7] In 2008, Wallach founded The Great Schlep — the viral GOTV campaign that mobilized young Jewish voters for Obama in 2008.

[9] In 2008, he founded Synthesis Corp., a consultancy that works with governments, NGOs, foundations, and corporations to drive innovation, rethink business models, and improve organizational performance.

[10] Synthesis is working with the United Nations High Commissioner for Refugees to develop UNHCR labs aimed at enhancing innovation and improving tools and processes to better serve people of concern.[11][when?]

[14] He is also an advisory board member of the CITRIS Data and Democracy Initiative at the University of California, Berkeley.