Leadership behavior is a critical reflection of one’s leadership capability. Notably, having knowledge of leadership behaviors contributes to actually enacting these behaviors. Thus, the purpose of the current research is to validate a situational judgment test (SJT) measure to assess leadership behavioral knowledge. The first study aims to establish a multidimensional framework of leadership behaviors based on Campbell’s Model of Leader Performance (2012) and leadership inclusion behaviors toward diversity, equity, and inclusion (Shore et al., 2011; Silver et al., 2022). Using this framework, the second study proceeds to validate a SJT measure of leadership behavioral knowledge. Study findings suggest evidence supporting the multidimensional framework of leadership behaviors, in addition to the need for further refinement and validation of the SJT leadership measure. Altogether, the findings contribute to theoretically informing the construct space of effective leadership, in addition to providing practical guidance for developing a leadership assessment to be used for future leader selection, training, and development.