Leslie joined Oxfam GB in July 2011 and works on developing Oxfam's strategy in long-term water and sanitation, as well as supporting countries in their WASH and water resources management programming linked to policy.

Prior to joining Oxfam, Leslie worked primarily with UNICEF as a WASH specialist in Sri Lanka, Nepal, Philippines, Haiti and New York headquarters, including working in several emergencies as the WASH Cluster Coordinator. Leslie most recently worked as an independent consultant in WASH working on a number of projects for donors and other international NGOs including sector evaluations and developing capacity building guidelines in WASH.

Before moving to the international aid and development sector, Leslie worked for the Canadian government and private sector in Canada (environmental assessments and land development) as a Policy Planner. Leslie is a qualified urban and regional planner and holds an MA in environment, development and policy from the University of Sussex.