The aim of this paper is to develop a computer model based on service-oriented architecture hosted in cloud computing for the process of human resource allocation in multiple projects. We adopted qualitative approach to present computational. The results demonstrate that the proposed computational model can help to reduce the time spent by managers in the process of project elaboration, cost containment, and the scheduling of projects with impact on Resource-Constrained-Project-Scheduling-Problem. The contribution of this study is evidenced in the use of algorithms to achieve the lowest possible cost while respecting the competence of the human resources available in an environment of multiple projects.