WASHINGTON — Susan Molinari, who leads Google’s federal lobbying and policy effort and is a former Republican congresswoman from New York, is stepping down from her role at the company.

The change, during a turbulent time for Google, is the latest indication of a shake-up at the company’s large Washington operation.

Google has been under fire from lawmakers in Washington and Europe and faces growing antitrust scrutiny on both sides of the Atlantic. Corporate leaders at Alphabet, Google’s parent company, have been criticized by their workers for working on artificial intelligence with the Pentagon and for developing a search engine that would censor results in China.

Google subsequently did not renew its Pentagon contract and has not moved forward on the search product for China. Thousands of employees also walked out of work on Thursday to protest the company’s treatment of women.