Aaron M. Zebley is a former member of the special counsel investigation headed by Robert Mueller. He was the former chief of staff to Mueller at the FBI. Zebley followed Mueller from the Federal Bureau of Investigation to the law firm WilmerHale and also subsequently left when Mueller resigned to become the special counsel, along with James L. Quarles III.
Early life and education
Zebley was an FBI special agent working for the bureau's Counterterrorism Division for seven years. As an FBI agent, Zebley investigated al-Qaeda's bombings of U.S. embassies in east Africa in 1998, and after September 11 attacks was assigned to the FBI's PENTTBOM team, which investigated the terrorists responsible for the attacks. Zebley was one of the investigators who built the case against Zacarias Moussaoui, who was ultimately sentenced to life imprisonment. Zebley testified at Moussaoui's trial.
Zebley later joined the United States Department of Justice, where he was first an Assistant U.S. Attorney in the Alexandria, Virginia-based National Security and Terrorism Unit and later a senior counsel in the National Security Division, holding the position of senior counselor.
Zebley served as chief of staff to Robert Mueller when Mueller was Director of the FBI and in 2014 followed Mueller to the law firm WilmerHale, where he served as partner for three years. While in private practice at WilmerHale, Zebley was an expert in cybersecurity and represented a wide range of clients, including Justin Cooper, a former aide to Hillary Clinton, and the National Football League.
In May 2017, after Mueller was appointed as special counsel investigating Russian interference in the 2016 United States elections, Zebley resigned from WilmerHale to join the Special Counsel investigative team.
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