Work engagement in public service organizations has received little attention from researchers, especially during public organizational changes. This research aims to examine the relationships among perceived organizational support (POS), psychological capital (PsyCap), acceptance of change and work engagement in the context of Indonesian government policy implementation. Using the Job-Demands Resources (JD-R) model, the study also investigated the role of the acceptance of change as a mediator variable in the association between POS and PsyCap on work engagement.