The members of the Trade Union of Workers in Construction and Building Materials of Serbia – SEGIGMS employed at the Serbian company “ZMAJ AD”, Smederevo were exposed to dismissals because of unfair competition of sub-contractors in a project of the Steel Factory in Smederevo. The company got a contract for some construction works in the project where hundred workers were employed. The union reports good cooperation with the local and national trade Union, SRGIGMS. However, due to non-loyal competition workers started to be dismissed in November 2016 when contracts were awarded to other sub-contractors of the steel factory that were paying workers for same works below the national regulations, without individual employment contracts and appropriate occupational health and safety. The management of “ZMAJ AD”, Smederevo and the SRGIGMS, Serbia launched a joint action to solve the situation and approached the labour inspection with the request to control the situation on the spot.