Sean Callahan is the senior manager-content marketing at LinkedIn. Formerly, he was a marketing director at Bizo and an editor and reporter at Crain Communications. His freelance journalism has appeared in the New York Times, The Washington Post, Chicago Tribune, Chicago Sun-Times, Notre Dame Magazine, Salon.com, and SI.com. He is co-author of The Big Data-Driven Business: How to Use Big Data to Win Customers, Beat Competitors, and Boost Profits.