RETSO Radio: Mark Eckenrode by Ken Cook | Jan 14, 2010 | Radio | 0 comments Mark Eckenrode one of only 7 certified Master Guerilla Marketers on earth! Submit a Comment Cancel replyYour email address will not be published. Required fields are marked *Comment Name * Email * Website Save my name, email, and website in this browser for the next time I comment. This site uses Akismet to reduce spam. Learn how your comment data is processed.