This study focuses on the impact of calling orientation on employees' work engagement in securities industry, through the investigation of 291 securities employees, and also discusses the mediating role of professional identity and the moderating role of organizational identity in this mechanism. The results show: (1) Securities employees' calling orientation can significantly predict work engagement; (2) Professional identity serves as a partial mediator in the relationship between calling orientation and work engagement; (3) Organizational identity has a significant positive effect on the intermediary role of professional identity, referring that the impact of calling orientation on professional identity increase along with the increasing of organizational identity. © 2017 IEEE.