I joined LSHTM in 2006 as part of the Centre for Research on Drugs and Health Behaviour having previously worked at Imperial College.

My research focusses on improving the health of marginalised populations inluding people who use drugs or sell sex and reducing inequalities that impact them. I use participatory approaches, working closely with individuals, service users and services affected by the issue to formulate questions, design and implement the research, interpret findings and translate them into practice. My interests are interdisciplinary and I apply mixed methods but oriented towards epidemiological approaches, evidence syntheses and use of existing data sets.

Much of this work has focused on the UK, Russian Federation, Kenya, Uganda, India and currently in Myanmar, Malawi, Vietnam, Ukraine, Nigeria and South Africa.

I am co-director of the Centre for Evaluation.