President Joe Biden’s pick to serve as U.S. attorney for the Central District of California reported making nearly $4 million from Munger, Tolles & Olson, according to an ethics filing.

E. Martin Estrada, a partner at the firm in Los Angeles since 2014, focuses his practice on complex business litigation and government investigations. His clients included Disney, Wells Fargo, Facebook and the company’s founder and CEO, Mark Zuckerberg, according to his financial disclosure statement.