I have a background in both mathematics and physics, with an undergraduate degree in maths and a PhD in space physics. After three years as a post-doctoral physicist in Boston, I decided to make the transition into operational research applied to health care and joined the UCL Clinical Operational Research Unit (CORU) in late 2005. In 2008, I was promoted to the position of Senior Research Fellow and began leading CORU's work on global health. In October 2015, I was appointed a Reader of Operational Research and in October 2017 I became Director of CORU. I currently spend 1 day a week based as a "researcher in residence" within the critical care units at Great Ormond Street Hospital.

From August 2016 - August 2017, I was a Harkness Fellow in Health Policy, based in Boston, USA.