“…Despite the increasing interest in the intersections between positive attitudes, values, and the psychological and health literature, workplace outcomes in terms of sustainability and performance have not been explored and remain very limited [61]. Numerous researchers have investigated the role of optimism as a mediating variable in creative performance [62,63], work-life balance [64], subjective wellbeing [65,66], stress, interpersonal relationship [67], career [68], depression [69], demographics [70], and others. However, the relationship between optimism and workplace sustainability and performance remains underexplored.…”