An increasing number of people are working part-time hours, and this can present challenges for work design for both the employee and their organisation. This thesis reports findings from two independent studies examining the perceived inclusion, work engagement and performance of Australian part-time employees, compared with full-time employees. A Part-time Work Design (PTWD) Model, tested using Partial Least Squares (WarpPLS), showed part-time employees felt less included in the workplace. They also perceived their roles to be less autonomous and interdependent than full-time roles. The findings have implications for the management of part-time employees in modern workplaces.