One significant trend in the US workforce is the advancing median age of workers and the growing prevalence of chronic medical conditions that contribute to workplace pain, fatigue, task limitations, and reduced productivity. The proposed multi-site study is a randomized, controlled trial of a multi-session group intervention program targeting workers with chronic health concerns (N = 300). The primary outcome measures will be self-report measures of work limitations and work engagement measured at baseline, 6 months, and 12 months follow-up. Secondary outcomes will include turnover intention, sickness absence, job satisfaction, and healthcare utilization. Process variables and covariates will include assessment of self-efficacy, work-related fatigue, emotional distress, work characteristics, general health status, and basic demographic variables. The study should provide an assessment of whether principles of symptom self-management can be successfully applied to workplace problems and delivered in a group workshop format to reduce the disabling effects of chronic medical conditions.