I am an Associate Professor in the Department of Clinical Research at the London School of Hygiene and Tropical Medicine. I have positions and affiliations at Muhimbili University of Health & Allied Sciences and Ifakara Health Institute in Dar es Salaam, Tanzania, and  Karolinska Institutet and Karolinska University Hospital in Sweden.

I have a long-standing interest in evaluating and improving global health services and health systems, primarily in the area of emergency and critical care, focusing on the provision of good quality care to acutely ill patients in low-resource settings. I have developed the concept of Essential Emergency and Critical Care and am Principle Investigator on the Provision of Essential Treatments in Critical Illness project. I am a consultant for WHO, non-resident fellow at the Center for Global Development, founder of the NGO Life Support Foundation and am a member of several WHO and international  working groups, research groups and collaborations.

From 2016-2019 I lived and worked in Blantyre, Malawi and moved to my current base in Dar es Salaam, Tanzania in August 2019.