This research seeks to demonstrate the effectiveness of communication strategies and practices from decision makers to employees in the Information and Communication Technologies organizations. The purpose is the creation and eventual promotion of a communicational model that embraces best practice relative to overall team effectiveness. By placing decision makers and employees in the center of attention, we examine relations among several communication and team effectiveness practices in ICTs sector. Employees’ recognition, the motivation of exchange and sharing information, clear vision of goals and objectives for employees, and the troubleshooting effectiveness of team, are some of the major factors that indicate the relationship between Communication Strategies and Team Effectiveness. Via the application of a cross-cultural quantitative methodological tool in more than ten countries with a response rate more than 69%, we evaluate communicational strategies that decision makers adopt and their impact in Teamwork Effectiveness in the sensitive sector of ICTs.