Ms Mendelsohn will replace Carolyn Everson, who has maintained a close relationship with marketing executives
She was previously Facebook’s vice president for Europe, the Middle East and Africa, a role the company said it now wanted to fill.
Facebook declined to make Ms Mendelsohn available for an interview on Wednesday.
Ms Everson had served as Facebook’s liaison to the advertising community through a number of public-relations challenges in recent years, including the Cambridge Analytica data leak and last year’s attempt by an advertiser to control hate speech and misinformation. boycotted over the failure of the social-media platform.
Ms Mendelsohn assumes the role as Facebook faces new scrutiny on topics including the pursuit of young users and how it responds to abuse of its products.
Businesshala series of articles draws attention, based in large part on documents collected by former Facebook product manager Frances Haugen, who testified in Congress on the subject last week.
Facebook is also navigating the effects of new privacy policies by Apple Inc.,
Facebook has said it would pose a risk to its business and undermine its ad-tracking tools.
Megan Graham at m[email protected]