President Joe Biden plans to nominate Jonathan Kanter as head of the Justice Department’s antitrust division, the White House said Tuesday, the latest sign that the administration is preparing a broad crackdown on large technology companies.

Kanter, 47, who left one of the country’s biggest law firms last year to start his own firm, is a long-time foe of Alphabet Inc.’s Google, representing companies that have pushed antitrust enforcers to sue the search giant.

Kanter has “been a leading advocate and expert in the effort to promote strong and meaningful antitrust enforcement and competition policy,” the White House said in a statement.

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Sarah Miller, head of anti-monopoly group American Economic Liberties Project, said Kanter was behind “successful legal arguments driving the major antitrust investigations into Big Tech.”