John Kotter is a renowned leadership and change management expert, best known for his work on organizational change. He is a professor at the Harvard Business School and has authored several influential books, including "Leading Change," which outlines an eight-step process for successful change implementation. Kotter's research emphasizes the importance of effective leadership in navigating change within organizations. His ideas have shaped the field of change management, making him a key figure in understanding how businesses can adapt and thrive in a constantly evolving environment.