My goal is to enable the development of resilient and sustainable agro-ecosystems. Over the last 20 years I have investigated soil nitrogen and carbon cycling in diverse ecosystems, from cotton and sugarcane production systems, semi-arid rangelands to tropical bio-diverse Pacific farming systems. This work has focused on quantifying carbon and nitrogen cycling, improving profitability and reducing environmental impacts. Besides working on intensive Australian production systems I have worked with small holder farmers in Vietnam, Tonga, Fiji, Kiribati, Tuvalu and Samoa.I am the current leader of the Soil Process and Function Group within the Sustainability Program of the CSIRO Agriculture and Food Business Unit. The group is aiming to improve resilience and sustainability of Australian and regional agroecosystems. We will achieve this aim by innovating and collaborating with diverse range of institutions, industries, and people.