Motivation and work motivation are multidisciplinary topics important for the successful functioning of modern organizations. Opportunities to improve the effects and performance of all types of organizations by influencing employee motivation have resulted in a number of studies aimed at identifying motivational factors, their impact and hierarchy. Work motivational factors are numerous, and their impact and hierarchy are changeable and depend on socio-economic conditions, cultural determinants, as well as the individual characteristics of employees. In order to improve the motivation for work, there is a need to identify factors and their impact on the motivation and effects of the work of the Serbian Armed Forces professional members in their own cultural environment and the current set of socio-economic conditions. The objective of this paper is to develop a model for identifying motivational factors of the Serbian Armed Forces professional members and determine their impact and hierarchy. The paper will use the method of document content analysis in order to identify a list of motivational factors that will then be confirmed or rejected, depending on the results of research conducted using the research method, survey technique and statistical method. The paper presents a model for identifying work motivational factors and the results of a survey of the attitudes of a quota sample of 1401 Serbian Armed Forces professional members. The hierarchy of factors is presented and it has been concluded that good interpersonal relationships and salary amount have the most significant impact on the motivation for work of the Serbian Armed Forces professional members. The results of the research can be used for improving the motivation for work, normative acts, organizational structure and instruments for future research.