The present study was conducted to investigate the impact of effective factors on competitiveness of science and technology in Iran in provider unites of specialized technological services based on Porter’s competitive forces model. The statistical population of this study consisted of all employees of 92 research institutes as provider unites which were classified into four groups, namely universities, ministry of science, research, and technology, private sectors, and other organizations. A questionnaire was used for data collection. The results of this study confirmed Porter’s competitive forces model in technical research institutes of the country. Finally, limitations and some suggestions for further research are presented.