Theo Tsotsis is the Robert E. Vivian Professor in Energy Resources in the Mork Family Department of Chemical Engineering and Materials Science at the University of Southern California (USC), where he served as the Department’s inaugural Chair in 2005. His research interests are in the areas of transport, adsorption and reaction in complex porous media, reaction engineering, reactor design, and membrane separations.  He is the author of over 290 technical papers, numerous book chapters, eight U. S. and one European patent, and one book. He has also edited two Technical Meeting Proceedings volumes. He has worked on a broad array of problems, ranging from the abstract and theoretical (symmetry breaking instabilities, reaction rate oscillations) to the practical and applied (CO2 capture and storage, and membrane reactors and bioreactors). Professor Tsotsis was the co-founder of USC's NSF/IGERT Center in Environmental Engineering. He is a Fellow of the AIChE.