Evaluation occurs in a context where ethical dilemmas are frequent and unavoidable. Evaluators must daily deal with various ethical tensions that could potentially influence the quality of their work. Using an analytical model that allows us to categorize evaluators according to whether they are the corporatist type (sensitive to the reputation of the profession and to market pressures) or the altruistic type (sensitive to the social impacts of evaluation), we sought to discover if evaluators demonstrated the same sensitivities when faced with ethical dilemmas. Inspired by a research methodology put forward by Morris and Jacobs, we met with and interviewed Canadian evaluators of public policies. Our research led us to conclude that the altruistic type show a high ethical sensitivity, while the corporatist type show a more moderate ethical sensitivity. We also observed that other factors such as the evaluation environment (internal or external) and experience can influence ethical sensitivity.#2011Conference #ResearchonEvaluation