Lipstadt served as U.S. Special Envoy to Monitor and Combat Anti-Semitism from 2022 to 2025.

She specializes in combatting Holocaust denial.

• In 1996, prominent British Holocaust denier David Irving unsuccessfully sued Lipstadt for libel, which she wrote about in her book History on Trial: My Day in Court with a Holocaust Denier. David Irving was later criminally convicted of Holocaust denial in Austria in 2006.