My work is developing and using systems thinking to help manage the inevitable uncertainty in any engineering project. There is an urgent need to improve our understanding and our ability to identify and control the technical 'hard systems' risks that are embedded in human and organisational 'soft system' risks. We need to do this to manage change and to prevent harm to people and our environment and to create opportunities. We have to find ways of learning better from our collective experience and combat organisational 'silos'. The theme of systems thinking is integration