IES d.o.o. is an engineering company based in Belgrade, Republic of Serbia. It is a subsidiary company of Italferr S.p.A. (the Italian engineering and supervising company that belongs to the State Railways Group). Italferr holds 100% of capital of IES d.o.o. and has made this strategic choice with the aim to transfer best engineering traditions to the Serbian sister Company, especially in the railway field, that represents one of the main strengths of Italferr. For the past seven years IES d.o.o. has demonstrated the capability to provide multi-disciplinary services and comprehensive quality designs in the railway and road fields. A highly qualified staff provides a professional mix covering the whole range of civil engineering, architectural design, mechanical, alignment and hydraulic design. Expertise that IES d.o.o. provides range from preparation and production of general, preliminary and main designs, supervision of designs and constructions, verification of designs and technical assistance, to consultant services. IES d.o.o. has already developed, in conjunction with Italferr, various projects on the Serbian, European and International markets in the field of infrastruc¬ture engineering.