According to the official website of the Swedish-Swiss multinational corporation ABB, they have office, and they are working in Iran.

ifmat - ABB office in Iran

Despite U.S. sanctions on Iran Regime and regime sponsor for terrorist organizations, funding terrorist attacks, buling weapons of mass destruction and missiles, threating other countries to destroy them, ABB Group from Switzerland continues to work in Iran.

Also in May 3-4, 2016 in Zurich, Switzerland six delegates from ABB were listed as registered delegates at the 3rd Europe-Iran forum.