18: Mark Schaefer of Schaefer Marketing Solutions
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Mark W. Schaefer is a globally-recognized blogger, educator, business consultant, and author who blogs at {grow} — one of the top marketing blogs of the world. Mark has worked in global sales, PR, and marketing positions for nearly 30 years and now provides consulting services as Executive Director of U.S.-based Schaefer Marketing Solutions. His clients include both start-ups and global brands such as Cisco, AT&T, Johnson & Johnson, and the UK government.