That decision marked the beginning of Dellner's gradual expansion as a global supplier of train coupling systems.

[6] After the collapse of the Soviet Union and the economic opening of Eastern Europe, Dellner expanded into the countries of the former Warsaw Pact.

After 1997, Poland became an important location for Dellner, with a branch in Gdynia at which an increasing amount of production capacity was created in subsequent years.

In early 2021, Dellner acquired the couplers business of CAF MiiRA, a subsidiary of the Spanish train and bus producer Construcciones y Auxiliar de Ferrocarriles.

The international management team including CEO Fredric Håkansson, CFO Thomas Leander and COO Stephan Weng as well as many global business units such as Sales, HR, Dellner Service, R&D, Finance, Quality or Procurement are located here.

[13] Dellner has production and service facilities in India, Poland, Sweden, France, Germany, Italy, China, Australia, Brazil, Argentina, Singapore, the United Kingdom and the USA.

In addition to the production and final assembly of couplers, Poland also serves as Dellner's distribution center for various Eastern and Southern European countries.

[15] Dellner is represented in India by a total of 170 employees at two locations: a service center for couplers and gangways is located in Noida in the state of Uttar Pradesh, and Dellner has a production facility for gangways and couplers in Mevalurkuppam near the southern Indian port city of Chennai.

Since 2012, the company has been operating under the name Dellner Inc. with two locations in Charlotte, North Carolina, and Roseville, California, with over 40 employees.

[20]Dellner has a long tradition of researching and developing technologies related to couplers and, later, complete train connection systems.

[24] Dellner has been a member of the Shift2Rail initiative and the European Union's DAC Delivery Program for the development of a digital automatic coupler for freight trains since 2020.

[27] As a member of the European Union's DAC Delivery Program, Dellner is also working on the development of a digital coupler according to the DAC-5 standard.