Senior Lecturer / Honorary Consultant in Anaesthesia and Critical Care Medicine at University College London and the Royal Free Hospital.

Daniel was one of the deputy research leaders for the Caudwell Xtreme-Everest expedition to Everest in 2007 and Cho Oyu 2006. He was also the leader of the Xtreme Alps 2010 research expedition to the Margherita Hut laboratory. His current research interests are in the microcirculatory blood flow and tissue oxygenation at high altitude and in critically ill patients. He has previously been involved in research exploring the effect of the ACE gene polymorhism on cardiovascular disease. Daniel is a one of the course directors for the extreme environment physiology BSc course at UCL and course lecturer / tutor for the UCL MSc in Sports Medicine, Exercise & Health.

Daniel was a member of the CASE Baruntse 2003 expedition; he summitted Cho Oyu in 2006 then Mount Everest in May 2007 along with other members of the CASE team. During experiments on the 2007 expedition, Daniel had the lowest level of oxygen ever reported in a human, from arterial blood, measured near the summit of Mount Everest.

Daniel also provides acute medical care for major sporting events with TriMedics and has a particular interest in the treatment of exertional heatstroke in athletes.