After certain time period of operating locally, enterprise's managementcan decide to come out to the international market. With such of a business venture, they want to reach economy of scale, to encourage boosting inovations and development od new goods and services, but also to boost usage of new technologies. As a final benefit of coming out to the international market, enterprise can achieve the rise of level of competitiveness, bigger market share, achieving higher level of profit, improvement of financial indicators etc. Performing investment business abroad is a business activity which is controlled by law and legal acts of each foreign country. Performing this kind of work is usually done by enterprises which are specialized in construction, montage, designing, engineering, consulting and other related work. The need for engagement of this type of narrowly specialized enterprises is being changed due to different claims of different investment projects, but also demands of clients which ordered investment work. Furthermore, other enterprises and participants can be included in doing investment business abroad, such as banks and international financial institutions, insurance companies, manufacturers, suppliers and so on. This paper will cover the topic of entering international market, together with strategies and models which are used for it; and the proces of doing investment business abroad itself. Also, it will be explained in detail which are the specifics of exporting engineering business.