Dr Chris McSweeney is Chief Research Scientist at CSIRO, Australia, and is internationally-renowned for his research in ruminant gut microbiology and its implications for nutrition and livestock emissions. Dr Rod Mackie is Professor of Microbiology at the University of Illinois at Urbana-Champaign, USA. Professor Mackie is a leading expert on microbial ecology in the ruminant gut and its impact on nutrition and health, as well as the use of bacteria in bioenergy applications. Christopher Creevey is Professor of Computational Biology at the School of Biological Sciences and the Institute of Global Food Security (IGFS), Queen’s University, Belfast (QUB). He is an authority in systems-level analyses of biological function in both model and non-model organisms having worked previously in the European Molecular Biology Laboratory in Heidelberg and as a Science Foundation Ireland Stokes Lecturer in Teagasc and a Reader in Rumen Systems Biology at IBERS, Aberystwyth University. Dr Rod Mackie is Professor of Microbiology at the University of Illinois at Urbana-Champaign, USA. Professor Mackie is a leading expert on microbial ecology in the ruminant gut and its impact on nutrition and health, as well as the use of bacteria in bioenergy applications.