Deborah Miller has a longstanding interest in mountain medicine. She is a paediatrician, originally trained in the UK, and now based in California. She is a founding faculty member of the UK Diploma in Mountain Medicine and teaches in the UK and North America, including the Canadian Diploma in Mountain Medicine. 

She has worked for the Himalayan Rescue Association in Pheriche, the IPPG clinic in Machermo, on medical research expeditions with Medex in Nepal, and as a doctor on ski patrol in New Zealand. Alongside this, she has worked in various roles in resource-limited settings in Kenya, Tanzania, Malawi, Uganda, Chile, Nepal, and India. Most recently, she has been working in paediatrics in the Northern Mariana Islands.