Research has shown that links exist between human capital factors (i.e., employee education, training, certification, and work experience) and organizational outcomes such as job performance, competitive advantage, and operational effectiveness. Few studies have examined the role of human capital in the field of information security despite these links. This study addressed that gap by examining the extent to which information security managers': (1) level of formal education; (2) number of professional certifications; (3) length of work experience; and (4) number of completed security training programs related to the number of data breaches experienced by U.S. organizations. This study utilized a nonmanipulative, correlational design to explore the predictive relationships between the human capital factors, which functioned as independent predictor variables and the number of data breaches, which functioned as the dependent or outcome variable. The target population included U.S. information security managers. The study's sample consisted of 101 participants that were representative of the population. The data were analyzed using bivariate correlation and multiple regression techniques. The study showed significant correlations between information security managers' levels of formal education, the number of information security certifications, and the number of completed security training programs with the number of data breaches experienced by organizations. Information security managers' length of work experience was not found to have a statistically significant relationship with the number of data breaches. The results indicate that in order to improve security program effectiveness, organizations should pay special attention to formal education, security certification, and security training in the qualification or the development of their security managers. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]