This paper aims to study the relationships between National Culture (Power Distance, Individualism and Collectivism, Masculinity and Femininity, and Uncertainty Avoidance) and Employee Performance (Work Result, Job Knowledge, and Job Satisfaction). This research using descriptive research with survey questionnaire. The selected 400 respondents are low-to-middle management level employees, who are working with the US Multinational Corporation (MNC) located in Bangkok during June 2013 to August 2013. Employees are classified by gender of which this study have normally distributed to 49.5 percent male (198 respondents) and 50.5 percent female (202 respondents). Methodology used in this research is Pearson Correlation Analysis testing relationships between National Culture and Employee Performance. All hypotheses show that there is a significant relationship between National Culture and Employee Performance. The research result supported by Newman and Stanley (1996), suggested that National Culture is the central principle of organization as it also the principle of employee understanding of their work and which type of action is preferable by others. Additionally, study of Taras, Steel, and Kirkman (2011) indicated that National Culture does influence Employee Performance base on the nature of the job. They believe National Culture affect peoples' attitudes, perception, and behavior which does influence on performance but whether in good or bad way depends on the fit between culture and individual nature of the job.
This research will benefit 3 parties including, organization with US MNC management style to understand the relationship of National Culture and Employee Performance. So they can manage to run their organization more effectively with better performance and lead to better profit. This research would benefit the readers who have no idea about US MNC, this research would give them an insightful information of what US MNC is all about. Lastly this research would benefit the researcher herself as she is now working in the US MNC. Conducting this research allows the researcher to know deep information of the US MNC in terms of strong and weak point, number of imports and export between US and Thailand each year, and the signifying relationship between National Culture and Employee Performance.
Keywords: National Culture, Employee Performance, Multinational Company (-ies)