A defensive coordinator is a coach responsible for developing and implementing the defensive strategy of a sports team, particularly in American football. This role involves analyzing the strengths and weaknesses of both their own players and the opposing team to create effective game plans. The defensive coordinator also instructs players on techniques and formations to improve their performance on the field. In addition to planning, the defensive coordinator makes real-time decisions during games, adjusting strategies based on the flow of play. They work closely with other coaches, including the head coach and position coaches, to ensure a cohesive approach to defense and overall team success.