With regard to its territorial size, economy and political power; Germany represents one of the most sustainable, competitive and economically developed Member States of the European Union. However, development of the knowledge-based economy on one hand and negative demographic trends on the other hand will force Germany to cover the growing demand for high-skilled labour force from non-EU countries in the coming years to keep this position. The paper analyses competitiveness within the framework of security and sustainability of the Federal Republic of Germany concerning labour migration from the third countries. Main research question of this article is formulated as follows: How can migration from the third countries influence economic development and competitiveness of Germany in terms of state’s demographic problems? With regard to the above, we try to verify our hypothesis claiming that compensation of the domestic workforce through regulated migration flows – necessary because of declining and aging population and skill disharmony in Germany – is only a short-time solution of the current situation on the German labour market, but it is not sustainable in the long run.