Job candidates who avoid building an online profile might be at a significant disadvantage when competing for a position with those who tweet, post on Facebook, and have the coveted 500+ rating on LinkedIn.

CareerBuilder used survey data gathered by a Harris Poll to find out how important an online presence was to those with hiring authority. What popped up was that, to many of those surveyed, an online presence is critical even to getting that first job interview.

"More than one third of employers (35 percent) say they are less likely to interview job candidates if they are unable to find information about that person online," CareerBuilder reported. That's because these hiring professionals are using social media to construct their own candidate profile prior to deciding whether to interview an individual. It's almost as though hiring managers are looking at two resumes — one submitted by the candidate, and another crafted by the hiring manager.