Dr Lesley Sloss

Lesley is currently Principal Environmental Consultant with the Clean Coal Centre of the International Energy Agency where she has worked since 1990. In this time, Lesley has produced over 40 reports relating to the environmental consequences of coal combustion such as emissions, fly ash use, greenhouse effects and the associated legislation and control technologies. Lesley is lead on the United Nations Environment Programme (UNEP) Coal Partnership acting as advisor to the UN Governing Council on the International Legally Binding Instrument on Mercury Emissions (the Minamata Convention). 

Lesley is currently involved in several clean energy projects in Southeast Asia and Africa and travels extensively and frequently. However, she still finds time to enjoy family life, comedy (her son is a professional stand-up comedian), wine and crocheting tiny Star Wars characters.

Lesley was elected to the IES Council in 2016.


Joining the IES helps your personal and professional development. Whatever stage you are at in your career, the IES has membership services that will help you gain recognition and progress to the next level. Members come from all areas of the environment sector, wherever jobs are underpinned by sound science. Your membership grade within the IES depends on what stage you are at in your career.

Membership provides an extensive package of benefits including:

  • 4 journals, the environmental SCIENTIST, per annum
  • Regional and national events
  • Contribute to our policy and guidance work
  • Chance to apply for Chartered Scientist, Chartered Environmentalist and Registered Environmental Technician
  • Recognition of professional status
  • CPD recording tools
  • Use of post-nominal letters
  • Access to our exclusive monthly webinars
  • Regular reports on the environmental science sector