By asking users of career-oriented social networking sites I investigated their job search behavior. For further IS-theorizing I integrated the number of a user’s contacts as an own construct into Venkatesh’s et al. UTAUT2 model, which substantially rose its predictive quality from 19.0 percent to 80.5 percent concerning the variance of job search success. Besides other interesting results I found a substantial negative relationship between the number of contacts and job search success, which supports the experience of practitioners but contradicts scholarly findings. The results are useful for scholars and practitioners.