31 Aug 2023 NBCUniversal Promotes Linda Yaccarino’s Replacement: Mark Marshall Named Ad Chief by Bolaji O | posted in: All News | 0 The executive had been acting as interim chairman since May, when Yaccarino departed the company to become CEO of Twitter. Source: https://www.hollywoodreporter.com/business/business-news/nbcuniversal-mark-marshall-named-ad-chief-1235578123/