The SDGs represent a key avenue to foster a new developmental model demanded by trade unions worldwide. Development cooperation, including SouthSouth and Triangular Cooperation (SSTC), is critical elements to support change along this path. Trade unions are strongly involved in SSTC through programmes covering a range of crucial areas to achieve the SDGs, such as labour rights, occupational health and safety rights, social protection, gender equality, organising workers, enhancing social dialogue processes and industrial relations. This brief showcases a sample of trade union SSTC programmes in those areas, illustrating direct contributions to the SDGs, and highlighting the link to the development effectiveness principles.