IntroductionThe importance of the human element of any organization, whether it operates locally or internationally, has been noted, becoming the human element and the knowledge and skills of the one of the companies were evaluated only the financial aspects, the human element is capable of exploiting the various other elements for optimization. While recognizing the importance of the human element, we cannot ignore the impact of the environment on this element and we can say that the environment plays a major role in the success of a Manager in the performance of his or her functions. Hence the importance of attention to managers, a person who succeeds in managing the organization in one country fails in managing a similar organization in another country, due to different environmental effects. Sources of human resources: 1. Nationals of the country of origin Many international companies prefer to fill key positions in their units abroad, managers, technicians and experts from the country of origin. This has many characteristics, including: • The fact that these workers coming from their home country, experts who work with them and know well how to work in their country, understand this knowledge transferred to employees abroad. • Learn many things from abroad such as the culture of the people in the country. foreign country, and the functioning of global markets, the nature of consumers and how to accept them for the company's products.• Acquire the knowledge and skills available in the foreign country and host in the homeland.• Ensure the loyalty of these workers, particularly in a crisis situation between the international and the host country or between the country of origin and the host country. The disadvantages of working from country of origin selection are:• The additional cost caused by the middle of paper... ...sis, environment, regulation- Polarization- Training- Wages and salaries- Evaluation of performance- Rehabilitation experts return homeConclusionThe above highlights the complexity of human resource management on local variables which are not at the local level.There is a process of comparison and selection between alternative sources of human resources, international human resource management faces various challenges in an expatriate country, the management members of the properties of some recipes which help them to do business in that country after that adapt and cope with all the new environmental variables. It is part of the exercise of public functions of human resources management to analyze, recruit and train staff and evaluate their performance and determine their remuneration and return to their country of origin after their missions..