Andrianna (Annie) Kastanek, a former federal prosecutor and Supreme Court clerk, is a member of the Appellate and Supreme Court and the Investigations, Compliance, and Defense practices. Ms. Kastanek has supervised briefing and arguments in more than 200 cases before the US Court of Appeals for the Seventh Circuit and personally argued more than 40 federal appeals. She has first-chaired numerous complex investigations and tried 12 cases in federal court. She leverages her vast appellate, trial court, and investigative experience to successfully represent clients in high stakes matters.

Prior to joining Jenner & Block, Ms. Kastanek was an Assistant US Attorney in the US Attorney’s Office for the Northern District of Illinois. She held numerous leadership positions during her decade-long tenure in that office, including serving for three years as its Chief of Appeals. As appellate chief, Ms. Kastanek supervised the office’s criminal appeals in the US Court of Appeals for the Seventh Circuit and acted as a legal advisor to the US Attorney and other prosecutors, providing legal and strategic counsel in the context of the office’s most complex fraud, public corruption, national security, and racketeering prosecutions. Ms. Kastanek is a recipient of the Director’s Award for Superior Performance of an Appellate Team, awarded by the Department of Justice’s Executive Office for US Attorneys.

Ms. Kastanek also has first-chaired investigations involving allegations of public corruption, computer and cybercrime, and fraud, and served as the US Attorney’s Office’s Civil Rights Coordinator, supervising the investigation and prosecution of excessive force and hate crimes matters.

Ms. Kastanek clerked for Justice Anthony M. Kennedy of the US Supreme Court and Judge Kenneth F. Ripple of the Seventh Circuit. She graduated from Northwestern Pritzker School of Law, magna cum laude, and has served as an adjunct law professor at her alma mater, teaching courses on the US Supreme Court.