President Donald Trump has nominated Nicola Hanna to head the Los Angeles U.S. Attorney's Office, the nation's second-largest federal prosecutor's office behind only Washington, D.C. Hanna was among a group of five U.S. attorney nominees the White House announced Friday.

Hanna was a white-collar partner at Gibson, Dunn & Crutcher's Irvine and Los Angeles offices prior to being named interim U.S. attorney for the U.S. Attorney's Office for the Central District of California last month by U.S. Attorney General Jeff Sessions. At the firm, he recently helped handle Apple Inc.'s antitrust case accusing Qualcomm Inc. of abusing its market dominance over baseband processor chips to leverage outsized royalties for its technology.

Prior to joining Gibson Dunn, Hanna served as an assistant U.S. attorney in LA from 1990 to 1995 and in San Diego from 1995 to 1998. During his prior stint in government service, Hanna prosecuted cases involving international drug cartels, money laundering organizations, violent crime and economic fraud. Hanna attended UC-San Diego as an undergraduate and graduated law school magna cum laude from Georgetown University.