Since 2002, Wenaweser has been the Permanent Representative of Liechtenstein to the
United Nations. In this capacity, he has been particularly active in developing the
International Criminal Court (ICC) further. Within the Assembly of States Parties of the ICC, Wenaweser chaired the Special Working Group on the
Crime of Aggression from 2003 and 2009. In 2007, he was elected to a three-year term as the president of the Assembly of States Parties. In this position, he succeeded
Bruno Stagno Ugarte of
Costa Rica. In December 2011, he was succeeded as the President of the Assembly by
Tiina Intelmann. Between 2003 and 2005 Wenaweser also served as chairman of the ad hoc Committee on the Scope of Legal Protection under the
Convention on the Safety of United Nations and Associated Personnel From 2004 until 2005, he was vice-chair of the Open-Ended Working Group on Security Council Reform. ==Other activities==