Research literature makes it clear that transformational leadership has a positive and desirable impact in organizations, in different cultural settings, and within different leadership contexts (Judge & Piccolo, 2004). Not everyone in a leadership position has the necessary skills, however, to provide transformational leadership (Barbuto, 2005). Various leadership training programs have been developed to enhance interpersonal and emotional competencies (Riggio & Lee, 2007) and to develop transformational leadership behaviors (Barling, Weber, & Kelloway, 1996). Most training programs validated by research, however, tend to be designed for specific leader-manager populations, such as nurse-managers or educational administrators. Until now, research literature does not reveal an empirically studied universal transformational leadership training program that is available on a large scale for leader-managers from diverse industries who lead within different contexts. The Dale Carnegie Course^® is based on 30 principles of communication and human relations. Each of the course's sessions has objectives for participants, around which various exercises are designed to develop skills that appear to be significantly aligned with operational definitions of transformational leadership. A quantitative research study was undertaken to determine whether the Dale Carnegie Course^® measurably enhances transformational leadership behaviors in leader-manager course participants, regardless of their field, the local setting in which they work, or the number of constituents that report to them. By administering the Multifactor Leadership Questionnaire (MLQ) to diverse Dale Carnegie Course^® participants who are leader-managers, and the MLQ 360° rater version for their constituents to rate them pre- and post-course, data demonstrated that the Dale Carnegie Course^® significantly enhances transformational leadership behaviors universally, and fulfills the need for a widely available training program for leader-managers in different leadership contexts.