Simon Henley discusses the skills needed to manage complex projects. Complex projects have many sources of complexity including technical, political, organizational, and experience-related factors. Complexity introduces non-linearities that do not respond to traditional linear management methods. Complex projects require more than just project management skills and involve factors like emergence, uncertainty, and political influences rather than just cost or technical difficulty. Managing complex projects requires using a range of technical, management, social, and other tools together in a whole systems approach along with skills in areas like leadership, culture, and learning.