Most correctional officers describe their jobs as stressful. The current study advances the scholarship on correctional stress by offering a rare qualitative analysis that identifies, provides meaning, and contextualizes sources of stress in correctional services. This study complements the correctional stress literature, which, until now, has relied primarily on quantitative methodologies to identify and assess stress determinants. Forty-four correctional officers from Canada’s federal prisons were interviewed about their primary source of stress. Findings indicate that staff (i.e., co-workers and managers), not prison residents, represent a primary source of stress in correctional work. In addition, job seniority and gossip were the main stress triggers associated with co-workers, while centralization of decision-making processes and a lack of instrumental communication and support triggered stress coming from managers.