2012 - present Senior Lecturer in Ecology, School of Earth and Environmental Sciences, University of Manchester.
2005 – 2012 Lecturer in Ecology, School of Earth, Atmospheric and Environmental Sciences, University of Manchester.
1996 – 2005 Lecturer in Ecology, Department of Life Sciences, King’s College London.
1993 - 1996 Postdoctoral Research Associate, Sheffield Centre for Arctic Ecology, Department of Animal and Plant Sciences, University of Sheffield.
1990 - 1993 Postdoctoral Research Fellow, NERC CEH Merlewood, Grange-over-Sands, Cumbria.
September 2009 - October 2018. Invited review panel member of University of Lund Centre for Studies of Carbon Cycle & Climate Interactions, Sweden.
September 2014 - September 2015. Invited external examiner for Arctic Mycology MSc Course, The University Centre in Svalbard, Svalbard, Norway.
October 2013. Invited talk at British Embassy, Moscow, Russia, at workshop 'Managed and unmanaged carbon intensive ecosystems (tundra, bogs, steppes, forests) and polar ecosystems under climate change and climate variability'.
June 2008. Invited vice-chair of international external review panel of research quality in Biogeosciences at the University of Lund, Sweden.
May 2008. Invited presentation for the Institute of Arctic Biology, University of Alaska, Fairbanks, Alaska, USA.