In international associations

International Union of Railways (UIC) is a non-profit organization based in Paris. It was founded with the aim of strengthening international co-operation among railways, presenting and promoting the interest of railway transport at a global level, as well as encouraging synergy between various world organizations and bodies which are involved in the development of rail transport.

Active members have the right to participate in all forums, platforms and working groups, as well as to obtain access to results, conclusions and reports relating to the area of railway undertakings, infrastructure, technology and research, transport safety, environment and sustainable development, legal groups, finance and purchasing.
UIC Regional and General Assembly were held in Paris, on December 11 and 12, 2012; on this occasion active UIC membership of HŽ Cargo was ratified. The Assemblies were attended by the President of the HŽ Cargo Management Board, Mr. Ivan Lešković. UIC Director General, Mr. Jean-Pierre Loubinoux, welcomed HŽ Cargo to active UIC membership.

The Community of European Railway and Infrastructure Companies (CER) brings together 70 companies from the European Union, candidate countries (Croatia, Macedonia and Turkey), as well as SEE countries and Norway and Switzerland. CER is based in Bruxelles, where it represents the interests of its members before the European Parliament, European Commission, Council of Ministers and other decision makers and participants in traffic operations. The key mission of CER is to promote the development of railways as a basis for the creation of a sustainable, efficient and environmentally friendly transport system, as well as to help in improving and developing the entire railway traffic.

CER is working on a freight status report regarding rail freight in Europe, which is to be published in mid 2013.
On February 27, 2013, CER General Assembly will be held in Bruxelles, where a formal vote regarding HŽ Cargo full membership will take place.

The International Rail Transport Committee (CIT) is based in Bern. It has competence in matters of international railway transport law and its implementation regulations. This association brings together some 200 railway undertakings, infrastructure operators, shipping and road transport undertakings and forwarding companies, which provide services of international passenger and freight transport. There are also around 120 organizations which are full CIT members.
Members have a right to free use of CIT documentation. The missions of CIT is a unified and practical application of the Convention concerning International Carriage by Rail (COTIF), standardization of legal relations between users of railway undertakings and infrastructure managers and representation of interests in public and private institutions.

In a circular letter dated January 7, 2013, addressed to CIT members, it was published that CIT Executive Committee received a full membership request from HŽ Cargo on December 17, 2012; in line with this, a decision was made to retroactively accept HŽ Cargo as a full member as of January 1, 2013.

G4 group is a regional group of the International Union of Railways, which was founded in 1992 by four central European railways: Austrian Federal Railways, Slovenian Railways, Croatian Railways and Hungarian Railways. The group was later joined by the Railways of the Federation of Bosnia and Herzegovina, GYSEV, ŽSR/ZSSK/ZSSK CARGO, MAV-START and Hungrail. The aim of G4 group is to harmonize the development of railways in the area between Danube and the Adriatic. Every railway undertaking which operates in the mentioned region can become a member if it is at the same time a UIC member. The G4 group was envisaged as a forum for discussion of all topics and ideas which are useful for efficient improvement of the rail system in the G4 area.

Upon Croatia's accession to the EU, it will be necessary to harmonize all regulations, trends and activities of its members. After the liberalization of the rail market, new possibilities will open up for HŽ Cargo to conduct business and be competitive on the European market, therefore it is important to be directly involved in new developments regarding railways in Europe and in the world, as well as to participate in their joint activities, held in the form of seminars, conferences, forums and working groups.