Participatory action research (PAR) can be used in the health professions to redefine their roles. This study investigated a small health professional group, the members of The Chiropractic Association Singapore (TCAS), by using a PAR method; researchers and participants gained insights into the self-regulation of a health profession. A qualitative process using a theory-building approach and an action component was a practical way of developing self-regulation in a small professional group. This approach bridged the gap between practice and research with TCAS members fully engaged in the process of being critically reflective of their future roles in the local health care market.