The primary purpose of this study is to map the temporal impact of a transformational leadership development intervention on leaders' awareness in the two public universities. Deans and heads from the two universities were involved in a six-week-long intervention. To study the short-term impact, an evaluation was conducted three months after the initial intervention with leaders of University A, and one year later, the next evaluation was conducted with leaders from University B to study the long-term impact. Semi-structured interviews and a case study method were adopted for data collection, and content analysis was carried out to identify indicators of awareness levels in leadership behaviours. Compared to the immediate post-intervention evaluation results, awareness levels decreased, but the results were still sufficiently robust compared to the baseline awareness levels measured in a control group. Implications and recommendations for future research will be discussed.