Israel N. Singer (born 1948 in the Bronx, New York) is an American lawyer, political scientist, rabbi, and Jewish communal leader who served as Secretary-General of the World Jewish Congress (WJC) from 1984 to 2007 and later as President of the Conference on Jewish Material Claims Against Germany (Claims Conference). A longtime WJC leader, he played a central role in Holocaust restitution negotiations, leading to major settlements including over $1.25 billion from Swiss banks in 1998 for dormant accounts and insurance policies, and agreements with German industry for slave labor compensation totaling around 5 billion euros. He also led the campaign to expose the Nazi past of Austrian President Kurt Waldheim and expanded the WJC's influence in global Jewish affairs, engaging with governments on issues like antisemitism and Soviet Jewry emigration. Singer's career in Jewish organizational leadership ended controversially in 2007 when he was dismissed by the WJC amid allegations of financial irregularities, including approving a $1.3 million salary package for himself and his daughter without proper authorization, other unauthorized payments totaling millions, and an unauthorized transfer of $1.2 million. This sparked internal divisions, lawsuits, public criticism from WJC President Edgar Bronfman Sr., and an investigation by the New York State Attorney General, which concluded that Singer had violated his fiduciary duties through mismanagement of funds. Singer contested the claims, attributing his ouster to factional politics; a subsequent arbitration partially vindicated him on some points but upheld his removal, and as part of a settlement, he was barred from holding fiscal or officer roles in the WJC for five years. No major legal convictions resulted from the WJC disputes, though they damaged his reputation within some Jewish organizational circles and drew scrutiny for his autocratic leadership style. Post-WJC, Singer transitioned to academia, currently serving as Vice President for International Affairs at Touro University, while maintaining activity in Jewish philanthropy and legal consulting related to restitution claims.