This study sought to assess the impact of a leadership development package on leadership competencies of head nurses working in the clinical settings, to identify the organisational climates to find the readiness and commitment of key management personnel towards the implementation of leadership development package to determine the satisfaction of participants with the leadership development package. Mixed methods approach starting with quantitative research followed by qualitative research approach was used. The mean self rated post test scores of head nurses in experimental group showed a significant increase from pre-test through all the post-test time periods for all the five leadership practices even at 0.001 level, whereas there was a significant decrease in the second mean self rated post-test scores for all five leadership practices and no significant change was noted for first and third mean self rated post-test scores for all the five leadership practices. The findings confirmed that the leadership development package was instrumental in bringing significant changes in all the five leadership practices of participants and the key management personnel also wanted to implement such programme.