Sean Costello

At a glance

Sean P. Costello is the U.S. attorney for Southern Alabama and a longtime federal prosecutor. His work includes criminal-division leadership, cybercrime and national-security matters.

Summary sources: [1]

Career and documented accomplishments

• Costello joined the Mobile U.S. Attorney's Office as an assistant U.S. attorney in 2003 and later served as criminal chief. [1]
• His assignments included Project Safe Childhood, computer hacking and intellectual property coordination, and national-security cyber matters involving digital evidence. [1]
• Before district service, he worked in DOJ's Office of Justice Programs and as counsel to the Senate Judiciary Committee. [1]
• He graduated from Georgetown's School of Foreign Service and the University of Alabama law school. [1]

Role and nomination context

• The currently retrieved DOJ biography records his oath following presidential nomination and Senate confirmation on August 14, 2026. [1]

Sources and review date

Career and role sources reviewed Oct 14, 2026. These sources may describe developments beyond the nomination snapshot; each nomination entry retains its recorded date and outcome.

1. Sean P. Costello current district biography

   U.S. Department of Justice. Reviewed Oct 14, 2026.