Source Employers are seeking candidates with established relationships in social networks, complete with a portfolio of individual and career defining social content – in the form of blog posts, videos, comments, and thoughtful updates. In some cases, size matters. Electronics retailer Best Buy recently posted a job opening for Senior Manager-Emerging Media Marketing. The role was described as, “the primary lead for the Best Buy’s mobile, social, and video marketing & media efforts to drive in-store and online sales, create…