marketer
From Longman Business Dictionarymarketermar‧ket‧er /ˈmɑːkɪtəˈmɑːrkɪtər/ (also marketeer) noun [countable]MARKETING1an organization that sells a product or servicea marketer of business information and related services2someone in a company who is responsible for marketing“The whole new premise of the campaign is to make the Pepsi generation bigger and broader, ” says a Pepsi marketer. → direct-mail marketer → direct marketer → mass marketer → niche marketer → see also telemarketer