In generally, the quality of human resources in Timor Leste still poor, weak in human resources it’s always causes contractor companies in Timor Leste when they have difficult organizing and managing construction projects. The purpose of this study is to determine the aspects of the quality of human resources simultaneously and partially affect the performance improvement of contractor companies. The method of this journal is applying the descriptive method by using a questionnaire distribution technique from 73 respondents to a contractor company in Timor Leste. The findings of this study indicate that simultaneously had ability to work, skilled in working, discipline in working, and technical expertise which have a positive and significant impact on improving the performance of contractor companies in Timor Leste. Meanwhile, knowledge in working partially has no effect on the performance of contractor companies in TimorLeste.