Strong physician leadership during clinical crisis can help improve patient outcomes. In this randomized controlled trial, obstetrics-gynecology and emergency medicine residents participated in one of three study arms using high-fidelity mannequins. One study arm received a bespoke leadership curriculum, one received a modified version TeamSTEPPS curriculum, and the third received no leadership training. Participants in both curriculum arms improved leadership scores from “average” before the training to “good” following the training and continuing to six months. The control arm remained unchanged at “average” before and after.