Book excerpt: Scientific interest in the leadership process has increasingly paid attention to the issues of ethics and integrity. Communities served by leaders are demanding a more ethical and inclusive leadership style. The purpose of this research proposal is to examine the relationship between ethics orientations and integrity types, as independent variables, and Peruvian managers' leadership styles, as the dependent variable. The research method involves a literature review of leadership theories, leadership styles, ethical orientations, and integrity types. The research model includes transformational, transactional, and laissez-faire leadership styles; deontological and teleological ethical orientations; and intelligence and moral integrity types. The study will use a quantitative approach with hypotheses related to the relationships between variables. The empirical examination will be applied to Peruvian managers. The psychometric instruments will be the Multifactor Leadership Questionnaire 5x - MLQ 5x (Bass & Avolio, 2004), Ethics Perspective Case Survey (Ampofo, 2004), Perceived Leader Integrity Scale - PLIS (Craig & Gustafson, 1998 ), and Aronson's Integrity Questionnaire (Aronson, 2003). Demographic information collected will be age, gender, educational level, and the number of years with the present company. Data analyses will include the use of statistical techniques such as the distribution of frequencies and descriptive statistics such as the median, mode, standard deviation, variance, Cronbach alpha, correlation, factorial analysis, scale of confidence, and multiple regressions. The software, namely, the Statistical Package for Social Sciences (SPSS v.15 ), and AMOS v.6 will be used. The research will test the relationships between deontological and teleological ethical orientations, intellectual and moral integrity types, and leadership styles.