Various combinations of traditional and agile project management (MPM) improve project success at varying levels of collaborative quality.Consequently, the purpose of this study is to examine the impact of teamworkquality (TWQ) on project performance (PM) via modern project management (MPM) and traditional project management (TRPM) in the Iraqi energy
market. To achieve this purpose, data were obtained from 202 project managers by simple random sampling, and the Partial Least Square (PLS)-Structural Equation Modeling (SEM) technique was utilized. In the research, a cross-sectional design and quantitative methodology were utilized. The regression analysis results suggest that TWQ has a positive and statistically significant effect on TRPM and MPM. TWQ also has strong and favorable effects on PM. Similarly, TRPM and MPM also have a major impact on PM. Additionally, the indirect implications demonstrate that the TWQ considerably and positively modulates the link between TRPM, MPM, and PM. Basedon these findings, it is recommended that businesses learn to execute both TRPM and MPM as a team to overcome the particular dangers posed by using a single approach. Lastly, organizations must establish good TRPM procedures before planning to implement agile methodologies. The findings of this study indicate that TRPM with strong MPM support and high-quality workgroups can improve project success. Therefore, the findings of this study could help practitioners and project managers understand the significance of TWQ, TRPM, and MPM in enhancing PM.