But Rosen's quiet departure, and the subsequent report by NPR, indicate that the network - as many other new outlets - is still grappling with how to handle such sexual misconduct allegations within its ranks.
But according to a report in NPR, Rosen left amid "scrutiny of his behavior at the network".
Rosen made "overt physical and sexual overtures" to three of his colleagues, including grabbing a woman's breast in a taxi in 2001 and then trying to take her sources, according to the NPR report, based on interviews with eight of Rosen's Fox News colleagues.
Fox News confirmed Rosen's departure in December, but did not say why the 18-year employee left or announce it on air. And attempts to reach Rosen were unsuccessful.
"There was a problem with our chief executive, sort of, over the years, isolated incidents", Murdoch told Sky News, referencing allegations that were made against the late Fox News' CEO Roger Ailes.
I appreciate all the good wishes you have sent to me and I hope to bring you news about my future endeavors soon.
He added that the attention "was largely political because we are conservative". Then, last April, Fox News lost one of its marquee names, when host Bill O'Reilly was forced out following an advertising boycott after the New York Times revealed a series of settlements, totaling $13 million, with women over sexual harassment allegations.
Just last month, Fox's owner, Rupert Murdoch, told Sky News that there had been no further allegations at the company after Mr. Ailes was sacked in 2016 - and that those allegations were "largely political because we're conservative".
Francisco Cortes, a former Fox News executive, was also fired in 2017 after being accused of sexual assault.
The network also parted ways with another host, Eric Bolling, after misconduct accusations.
Citing eight of Rosen's coworkers, the former Washington correspondent allegedly groped a Fox News reporter who joined the network shortly after the September 11, 2001 attacks during a shared cab ride.
A female producer also accused Rosen of sexual harassment, and a female journalist also alleged Rosen tried to forcibly kiss her in an elevator after she refused his first advances.
News attempted to contact Rosen, who has covered the White House and State Department, and he declined to comment to NPR. A foreign national, she reportedly accepted a deal from Fox to extend her stay in the U.S. in exchange for not going public with her allegations.