The National health strategy in Jordan for 2015-2019 has the objective of building a viable health care system, utilizing both public and private service providers and improving the quality of health services by implementing a national health services accreditation program. Human resources are the main drivers for achieving the needs of citizens optimally and a special attention need to be granted to managing these resources in order to raise the productivity of the health sector.In this context, the paper aims to prove the validity of Vroom's expectancy theory on six Jordanian both public and private hospitals having as main purpose the main determinants of employee motivation. According to Vroom's theory, the motivation is regarded as function of three distinct perceptions: expectancy, instrumentality, and valence. The study aims to test the hypotheses that each componentexpectancy, extrinsic instrumentality, intrinsic instrumentality, extrinsic valence and intrinsic valence have a positive effect on employee motivation using data from 325 health workers (doctors and nurses). The results show that from all five components, three of them best explains the process of motivating hospital employees-expectancy, extrinsic instrumentality and intrinsic valence.The results of the study emphasised the influential role of intrinsic factors comparative with the extrinsic factors, highlighting the importance of intrinsic factors on increasing the level of motivation of Jordanian employees.