Christoph is the Head of the Department of Sanitation Water and Solid Waste for Development (SANDEC) at the Swiss Federal Institute of Aquatic Research and Technology (EAWAG). He is an urban infrastructure planner with over 25 years of experience in planning and design of urban infrastructure in middle- and low-income countries. His special interests include the development of planning tools for basic services in unserved areas, citywide inclusive sanitation (CWIS), and multi-stakeholder planning and programming. His work has included assignments in India, Kenya, Nepal, Tanzania, Uganda, and Viet Nam.

Christoph is also involved with the Sustainable Sanitation Alliance (SuSanA) Lead Working Group on City Sanitation and is a member of the Urban Sanitation Initiative of the International Water Association.