Prof. Gideon Greif is a professor of Modern Jewish History and is an Israeli historian, educator, and pedagogue. He is the Chief Historian and Researcher at the "Shem Olam" Institute for Education, Documentation and Research on Faith and the Holocaust, Israel, Chief Historian and Researcher at the Foundation for Holocaust Education Projects in Miami, Florida and a senior Researcher and Historian at the Ono Academic College in Israel. Prof. Gideon Greif, who earned his Ph.D. in Modern History from the University of Vienna, is considered one of the world-renowned historian-experts in the history of Concentration and Extermination Camp Auschwitz-Birkenau. His most famous contribution to the history of Auschwitz is his pioneer, groundbreaking research "We Wept without Tears", on the history of the “Sonderkommando”, a special Jewish prisoner squad in Auschwitz-Birkenau, compelled to work at the mass killing installations.