Tamar is a Vice President in the World Jewish Congress, the international representative body of Jewish communities and organizations in nearly 100 countries.

Tamar is a social activist promoting social justice and gender equality and is currently a leading member in various socio-economic forums.

In previous positions, Tamar has served as the Chairperson of the Ben Gurion Student Association, followed by a term as the Chairperson of the World Union of Jewish Students (WUJS). Tamar was also a director in the Israeli office of UNICEF and the director of Academia and International Students Affairs in the Tel Aviv-Yafo Global City initiative.

Tamar has BA in Politics and Government and the Studies of the State of Israel from Ben Gurion University of the Negev, MA in Law from Bar Ilan University and a BA in Law from the Netanya Academic College.