Mark O’Malley is Chief Scientist, Energy Systems Integration and Senior Research Fellow at the National Renewable Energy Laboratory, USA. He is on sabbatical from University College Dublin where he holds the Chair of Electrical Engineering. He was the founding director of the International Institute for Energy Systems Integration which evolved into the Energy Systems Integration Group where he chairs the Research and Education Working Group. In 2017 he was the James M. Flaherty Visiting Professor at McGill University, Montreal, Canada. He is a foreign member of the US National Academy of Engineers, member of the Royal Irish Academy and a Fellow of the Institute of Electrical and Electronic Engineers and has received two Fulbright Fellowships. Mark is recognized as a world authority on Energy Systems Integration and Grid Integration of Renewable Energy.