This mixed-methods study of 84 job advertisements for international school leaders on six continents from 2006 to 2012 entailed both qualitative and quantitative research methods. Job advertisements were obtained from the most active recruiting agency for school leaders worldwide. Conventional and summative content analysis procedures were used to identify and measure five different leadership styles as follows: Managerial, Instructional, Collaborative/Distributive, Child-Centered, and Transformational Leadership. The assessment of the Transformational Leadership style required the most detailed analysis. We deemed 22 different characteristics as indicators of four Transformational Leadership categories. Results showed that school boards around the world have a stable and high level of demand for Managerial, Instructional, and Collaborative/Distributive leaders, particularly Inspirational Motivators and leaders who express Individualized Consideration. Results can be generalized to independent international schools overseas. Implications for leadership practice and theory are discussed.