From the perspective of almost fifty years of practice as an industrial-organizational (I-O) psychologist, it is extremely gratifying to witness and play a small part in the evolutionary advance of the profession. It is prefer to think of this work as illustrating a phase in the ongoing development of work psychology (WP). The breadth and quality of work reported in this chapter just a few years after the crystallization of the humanitarian work psychology (HWP) movement and the establishment of a global organization dedicated to HWP is extraordinary. The methods include recruitment, selection and training of NGO staff and/or volunteers; work-group level and organization-level team-building and other developmental interventions; performance management and retention programs; program evaluation research; and the development of occupational information in the form of work and person-analysis. It is hard to imagine that there could be a more comprehensive and satisfying representation of the profession as applied to humanitarian agendas.