After completing his medical training in the UK in 1997, Gerald headed for San Francisco. This took two years due to work as a Dive Master in the South Pacific, a Ski Patroller/Ski Area Doctor in New Zealand, Expedition Medical Officer and Himalayan Rescue Association Physician in Nepal and few other activities in between!

Gerald has been involved in research and teaching in high altitude medicine and physiology for over 20 years. His research interests include cardio-respiratory function and sleep at high altitude, especially using non-invasive research techniques. More recent research locations include the University of California White Mountain Research Station in California at 4250m and the hypoxia labs at UCSF. He is currently pursuing studies on new non-invasive cardiac output monitoring devices.

Gerald is a founding faculty member of the UK Diploma in Mountain Medicine and a Director of the UK Diploma Winter Theory Module based at the National Mountain Centre at Plas y Brenin in North Wales. He teaches on the EMT program for US National Park Service (NPS) Rangers in Kings Canyon and Sequoia National Park in California, and is also a faculty member and instructor on the NPS “Parkmedic” program, (Paramedic and Wilderness medical training for US NPS Rangers).

Gerald has climbed in the Himalayas, Alps, Andes, Africa and North America. His high altitude medical experience started as medical officer on the British Mount Everest Expedition in 1994 and he has been a doctor and researcher on several medical research expeditions to the Himalayas and Andes. He is also an enthusiastic mountain biker, skier, sea kayaker and SCUBA diver. He is a pilot and Aviation Medical Examiner for the Federal Aviation Administration and he is the Founder and Director of Global Partners in Anesthesia and Surgery, a multi-disciplinary education and research partnership, currently focusing on building a peri-operative health system capacity in Uganda.