Procurement at UNOG is carried out by the Purchase and Transportation Section (PTS), Central Support Services, Division of Administration.

PTS provides purchasing, contracting, business travel and transportation services to the following United Nations offices:

• United Nations Conference on Trade and Development (UNCTAD)
• Economic Commission for Europe (UNECE)
• United Nations Compensation Commission (UNCC)
• Office for the Coordination of Humanitarian Affairs (OCHA) - Geneva Office
• United Nations Environment Programme (UNEP) - Regional Office for Europe
• United Nations Institute for Training and Research (UNITAR)
• Office of the High Commissioner for Human Rights (OHCHR)
• Office of the United Nations High Commissioner for Refugees (UNHCR) (business travel and transportation only)

In addition PTS acts as the secretariat of the Common Procurement Activities Group (CPAG) for UNOG and specialized agencies of the United Nations system in Geneva. The CPAG strives to standardize and to pool procurement volumes of member organizations in order to allow economies of scale.