A sign for the Food and Drug Administration is seen outside of the headquarters on July 20, 2020 in White Oak, Maryland.

Frank Yiannas, a top official at the Food and Drug Administration in charge of the agency's food policy and response office, announced Wednesday that he is stepping down from his role as deputy commissioner.

Yiannas was among the FDA officials leading the agency as it navigated its way through last year's infant formula shortage after Abbott Laboratories voluntarily shut down production at the country's largest formula factory following reports that infants who consumed formula from the plant got sick.