Collaborations between the US and West Germany began in the 1970′s when both countries were investigating salt for the option of radioactive waste disposal. However, technical evaluations for disposal of heat-generating waste in salt experienced a rather long hiatus in the United States subsequent to certification of the Waste Isolation Pilot Plant and issuance of the Nuclear Waste Policy Act Amendment, which ended salt disposal research for the civilian program. Similar salt repository research in Germany was held up by a ten-year moratorium, which ended in 2010. At that time, developments in Germany and the United States led to renewed efforts in salt repository investigations. Representatives of institutions in both countries wished to renew collaborations and cooperation on overall salt repository science, to coordinate a potential research agenda of mutual interest, and to leverage collective efforts for the benefit of their respective programs. Thus, these workshops were re-initiated with the first workshop held in Mississippi. The purpose of that workshop was to assemble invited key investigators in salt repository science and engineering and to identify a coordinated research agenda that participants could agree in principle to pursue (individually or in concert with others), with the intent of maximizing individual resources for mutual benefit. The objectives of ongoing workshops are to build collaborative research activities, to create a potential research agenda, and to renew working relationships at the institutional and individual levels.