The financialization of development and the outsourcing of aid work to contracted businesses are strengthening the role of alternative drivers among practitioners engaged in international development work. These relate to but also transcend the dichotomy between altruism and personal self-interest, which often frames scholarly research on aid worker motivations. Focusing on consultants and development finance experts, this article highlights three institutional impetuses that guide practitioners’ work. They are concerned with the international competitiveness of donor operations, the stakes of one’s employer in cross-sectoral partnerships and the reputation and position of one’s professional sub-field. Consultants and development finance experts also highlight considerable staff movements across non- and for-profit institutions. In the increasingly complex architecture of aid interventions, such boundary-crossers operate in a new space of development brokerage, as mediators between public and private sector actors.