Previous empirical research of co-workership focuses on experiences of implementation or development programs. This study particularly intends to examine co-workership itself as there are no studies with the same focus. The purpose of this study was to shed light on employees’ perceptions of co-workership after an implementation of the topic and describe employees’ perceptions of sustainable and health-promoting working life factors in relation to co-workership. This is a qualitative study with semi-structured interviews based on ten employees from the same organization. The data collection is analyzed according to a phenomenographic approach to highlight significantly different perceptions. The outcome space describes employees’ perceptions of co-workership. Categories which highlight interactions & relationships and organizational insight & awareness as central perceptions of co-workership in this study. The category harmony emerged from perceptions of sustainable and health-promoting working life factors. Finally, the category symbiotic relationship, refers to perceptions of the relationship between sustainable and health-promoting working life factors and co-workership. This research contributes to increasing knowledge about how employees and work groups perceive co-workership where the implementation has taken place. Which also highlight the topics importance in promoting a sustainable and healthy working life.