Dr Dion O’Neale is based in the Physics Department at Auckland University and is a Principal Investigator in Te Pūnaha Matatini --- a New Zealand Centre of Research Excellence for network science and complex systems. His research in complex systems and network science uses mathematical models to understand how systems of many interacting parts can give rise to collective behaviour that can't be predicted from the individual components of the system. His work has applications to a wide range of systems: from innovation ecosystems, patterns of scientific collaboration, and regional networks of technologies; to networks of soil microbes and environmental variables in the Antarctic Dry Valleys; to country-scale networks of firms and workers. His research makes extensive use of big data analytics to formulate and verify the network models.