Guest post by Dan Schawbel (@DanSchawbel), a Gen Y career and workplace expert, the Founder of Millennial Branding and the author of the new book, Promote Yourself: The New Rules For Career Success (St. Martin’s Press). Back in 2007, I created the first social media position at EMC Corporation, a Fortune 200 technology company based outside of Boston, MA. Back then, selling the idea of social to the company was extremely tough because it was so new, management was afraid…