Complex sentence: He has subsequently worked as commissioning editor for openDemocracy, as a publications editor for Greenpeace and, between 1999 and 2001, as deputy editor of The Ecologist, the world's longest-running environmental magazine.
Split into simpler sentences: He has subsequently worked as commissioning editor for openDemocracy and as a publications editor for Greenpeace. Between 1999 and 2001 he was deputy editor of The Ecologist, the world's longest-running environmental magazine.