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He has been an independent election observer in central Asian countries, and in December 2009 was an advisor to the Democratic League of Kosovo (LDK) as it participated in local elections in Kosovo.
In September 1997 in the final phase of the rule of Yugoslav president Slobodan Milošević Hoppe has been OSCE-election observer during the parliamentary elections in Serbia.
He was a member of an American election observer team sent to the Philippines in 1986 and headed by Senator Richard Lugar to observe the Presidential election contest involving Ferdinand Marcos and Corazon Aquino.
He has twice led a delegation of Pakistan to the United Nations General Assembly and also at several other international forums, such as the Commonwealth election observer in Kenya, SAARC and the Cancun Summit on Natural Habitat.