This document summarizes research being conducted by the Third Sector Research Centre (TSRC) in the United Kingdom on work in the third sector. The research includes both quantitative and qualitative studies examining how social, economic, and policy changes are shaping the third sector workforce. Two long-term qualitative research projects are exploring careers, work practices, and organizational changes through case studies of organizations and interviews over multiple years. Preliminary findings point to diverse challenges and opportunities faced by different organizations and workers.