The research conducted in this study inquires about Information Technology (IT) managers' and executives' attitudes, beliefs, and knowledge on Cloud Computing (CC) security. The study evaluated how these factors affect IT managers' and executives' willingness to adopt CC solutions in their organizations. Confidentiality, integrity, and availability of data are areas of concern identified in this research. In spite of managers' and executives' security concerns on willingness to adopt CC solutions, CC is viewed as a technology paradigm that is quickly evolving to meet IT managers' and executives' security needs. This study further indicated that IT managers and executives are not adequately knowledgeable or trusting of Service Level Agreements (SLAs) that vendors have developed. A significant level of correlation or relationship between the dependent variable "willingness" and independent variables "security," "confidentiality," "integrity," and "availability" was observed in this research. The evaluation of the IT managers' and executives' concerns relative to adoption of the CC solutions was supported by several aspects of IT infrastructure and business resources. The indication of this research is that cloud vendors should allocate or develop Best Security Practices (BSPs), SLAs, and Physical Security Accesses (PSAs) to guarantee that their IT managers' and executives' security concerns on willingness to adopt CC solutions are fulfilled. The study provided the foundation to help IT managers and executives make recommendations for the best BSPs, SLAs, and the PSAs prior to adopting CC solutions in their organizations. Findings from this research could assist cloud providers, vendors, IT managers and executives decide on the BSPs, SLAs, and the PSAs suitable for the adoption of CC. [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://www.proquest.com/en-US/products/dissertations/individuals.shtml.]