[4] He served as a lead prosecutor in Robert S. Mueller's Special Counsel's Office (2017–2019), as Chief of the Fraud Section in the Department of Justice (2015–2017) and is currently a professor at NYU Law School.

Following a Fulbright scholarship to the University of Geneva, he received a Juris Doctor degree from Columbia Law School (1984).

In a follow-up case in U.S. District Court, Weissmann also was successful, controversially, at arguing that auditing firm Arthur Andersen LLP had covered up for Enron.

In that case, which resulted in the destruction of Andersen, he convinced the district judge to instruct the jury that they could convict the firm regardless of whether its employees knew they were violating the law.

[7] On June 19, 2017, Weissmann joined Special Counsel Mueller's team to investigate Russian interference in the 2016 United States elections.

A news report in March 2019 said he would soon leave the Justice Department and become a faculty member at New York University and work on public service projects.

[16] Weissmann has been described as a "pitbull" by The New York Times, and critics have said he deployed "hard-nosed tactics and a 'win-at-all-costs' mentality" in the Enron prosecution.