This study examines the social network ties, motivations, and experiences of high-stakes volunteers (HSVs): individuals who fulfill long-term, consistent, and intense time commitments providing medical, social, and/or psychological assistance. Interview, focus group, and observational data from three settings (volunteer firefighting, victims’ services/advocacy, outreach for at-risk youth) were analyzed using qualitative methods. Accordingly, five types of HSVs (stable lifer, imbalanced lifer, conventionalist, professional, crusader) are presented and discussed. These findings advance theoretical insight into the variety of individuals who take on HSV roles and contribute to growing scholarship on diversified approaches to volunteer management. [ABSTRACT FROM AUTHOR]