[2] Leng studied medicine at the University of Aberdeen, graduating MBChB in 1987, and became a Member of the Royal College of Physicians in 1990.
[3] Leng works with the global health Usher Institute[4] at the University of Edinburgh and at Makarere University, Kampala, Uganda is an associate faculty member and mentor to the international palliative care leadership initiative at the Institute for Palliative Medicine, San Diego Hospice, San Diego California, since 2010.
She was one of the founders and is the Medical Director of Cairdeas International Palliative Care Trust,[5] which is a registered charity based in Scotland.
Leng is a board member of the International Association for Hospice and Palliative Care and advisor to the Mehac Foundation, India.
Her personal care for dying patients in Uganda is recognised by families and in the Aberdeen press she was quoted as saying:“Listening and supporting what is important to that person and family even when time is short.”[8]Leng was admitted as a Fellow of the Royal Society of Edinburgh in 2021.