The issue of role ambiguity is pervasive among service providers (Judd et al., 2017). Role ambiguity refers to a lack of clarity in one's understanding of work assignments and performance (Kahn et al., 1964). For service providers, delivering human services relies on human-to-human interaction and therefore involves complex role relationships (Rai, 2016). Meanwhile, purchase-of-service contracts, i.e., contracts between the contractor and the service provider for services, can create ambiguity among workers about job roles (Schmid, 2013). Specifically, service providers may have a vague sense of whether they are serving a professional mission or serving the interests of the contractor (Cho, 2017;Schmid, 2013).Disability support workers (DSWs), who provide physical and emotional support to people with disabilities, often suffer from role ambiguity (Vassos & Nankervis, 2012). Because DSWs need to provide meticulous day-to-day care for people with disabilities, and multitasking can easily lead to role ambiguity (Vassos & Nankervis, 2012). Meanwhile, the purchased service contracts can also cause role ambiguity for DSWs (Zhao & Grotz, 2019). Taking China as an example, its purchasing services practice has strong government embeddedness. Specifically, the government as a