Judge Fleissig was appointed as a District Judge of the U.S. District Court for the Eastern District of Missouri in June 2010. In 2015, she was appointed as a member of the Judicial Conference Committee on Court Administration and Case Management (“CACM”), and currently serves as Chair of the CACM Committee. Judge Fleissig served as an adjunct professor at Washington University School of Law for over twenty years, teaching pretrial practice and procedure, trial advocacy, evidence, and electronic discovery and evidence. Prior to her appointment to the district court, Judge Fleissig was a Magistrate Judge in the Eastern District of Missouri for nine years, presiding over civil cases and the pretrial phase of criminal cases. She began her legal career in private practice, first as an associate and then an equity partner in the law firm of Peper, Martin, Jensen, Maichel and Hetlage, primarily handling securities, commodities, and other financial litigation, and class action litigation. In 1991, she left private practice to become an Assistant U.S. Attorney, handling criminal white-collar fraud cases. In 2000, she was confirmed as U.S. Attorney for the Eastern District of Missouri, the first woman appointed to the position in the state of Missouri. She has been a member of the Board of Governors of the Bar Association of Metropolitan St. Louis, President of the Women Lawyers’ Association of Greater St. Louis, and in 2016 was selected by Missouri Lawyers’ Weekly as Woman of the Year.