Previous studies have linked public-sector employees’ motivation to desired results such as higher performance and improved quality of public services. However, questions about the impact of employee motivation on public projects have received less attention. This article uses work motivation theory to explore the fundamental processes by which transformational leadership (TL) and public service motivation (PSM) engender public project success (PS). Analysis of 296 public servants’ data working on Pakistan public projects showed a positive correlation between TL, PSM, and PS. It also showed that PSM partially mediates the relationship between TL and PS.