Rob Leathern, Facebook Inc’s chief of advertising integrity, who handled the social media giant’s ad products around sensitive subjects including coronavirus misinformation and politics, has left the company, according to an internal memo.

Earlier this month Leathern had said on Facebook’s internal network that he would be leaving the company on December 30.

Facebook could not immediately be reached for immediate comment.

In his post, Leathern said he was “leaving Facebook to work on consumer privacy beyond just ads and social media”; he did not disclose his next destination.

He was often the public face of the company’s controversial political advertising policies. Prior to the November 3, 2020 U.S. Presidential election, Facebook was heavily criticized for allowing the spread of fake news and conspiracy theories on its platforms.

Earlier last year in November, Leathern had tweeted that Facebook did not have “the technical ability in the short term to enable political ads by state or by advertiser.”

Subsequently, Facebook lifted a temporary post-election ban on political ads in Georgia ahead of the January 5 runoff that will determine which party controls the U.S. Senate.

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