Project manager plays a very important role in the success of any project. The primary duty of the project manager is to combine the outcomes or results of the various processes and activities of project management into a systematic project management strategy or plan for the project. In the construction industry, a lack of motivation is an urgent problem for many project managers in construction and engineering projects. Lack of motivation affects the quality and productivity of jobs, reducing profits and growth for companies, businesses, contractors or organizations that rely on human resources. The reasons for this lack of motivation are diverse ranging from salary to culture to life and working environment, among others. Through surveys and data analysis using Cronbach’s Alpha reliability and EFA (Exploratory Factor Analysis), our research scaled the factors affecting work motivation of project managers in the construction industry in Vietnam. The research results identified six major groups of relevant factors including (i) salary and benefits, (ii) work environment, (iii) promotion opportunities, (iv) organizational culture, (v) interest in the job, and (vi) relationship with the organization. From there, this paper contributed useful information as well as measures for businesses, companies, contractors or organizations in the construction industry.

Abstract
1. Introduction
2. Literature Review
3. Research Methodology
4. Results and Discussion
5. Conclusions
References

• Phuong Thanh PHAN(Department of Project Management, Ho Chi Minh City Open University, Vietnam.)
• Cuong Phu PHAM(Faculty of Transport and Economics, Campus in Ho Chi Minh City, University of Transport and Communications, Vietnam.)
• Nhu Thi Quynh TRAN(Faculty of Economics and Construction Management, Mientrung University of Civil Engineering, Vietnam.)
• Hang Thi Thu LE(Department of Construction Management, University of Architecture Ho Chi Minh City, Vietnam.)
• Hanh Thi Hong NGUYEN(Faculty of Accounting and Auditing, Ho Chi Minh City Open University, Vietnam.)
• Quyen Le Hoang Thuy To NGUYEN(Deputy Director, Office of Cooperation and Research Management, Ho Chi Minh City Open University, Vietnam) Corresponding Author