The purpose of this study is to develop and test a model that investigates core self-evaluations as a mediator in the relationship between coworker support and work engagement. Data were collected from a sample of 100 full-time frontline employees of the five- and four-star hotels in Iran. The relationships were tested using hierarchical multiple regression analysis. The results demonstrate that core self-evaluations partially mediate the impact of coworker support on vigour, while it fully mediates the relationship between coworker support and dedication. In contrast, core self-evaluations do not function as a mediator in the relationship between coworker support and absorption. Implications of the findings are discussed and avenues for future research are offered.