White House communications chief Alyssa Farah is quitting her position with the Trump administration after three and a half years, CBS News reported Friday.

Farah is leaving to "pursue new opportunities" and described her stint in the White House as an "honor of a lifetime," she said in a statement.

Farah joined the Trump administration in her current capacity in April after serving as press secretary for U.S. vice president Mike Pence and press secretary for the Pentagon.

Farah's resignation is a sign Trump's inner circle believes president-elect Joe Biden's incoming administration will soon take over, sources said.

Her departure comes as Trump continues refusing to concede defeat. White House staff usually start to search for new jobs and exit during the period after an election.

Farah has kept a low profile and didn't publicly support Trump's allegations of voter fraud and assertions that he won the race. Instead, she focused much of her communications on the world health crisis and the treatments being developed to contain it.

But Farah recognized a number of Trump administration priorities in her resignation letter, including battling terror groups like ISIS, brokering peace deals between the Afghan government and the Taliban and launching Operation Warp Speed - the program that drives the development of a COVID vaccine.

The Washington Post, which first reported Farah's departure, said her last day in office was Friday. She aims to open a consulting agency with a focus on corporate and political issues and defense.