A Magnet-related program has been recently adopted in the Netherlands. Support for staff nurses from nurse middle managers (NMMs) is a key component of such a program. A Bourdieusian ethnographic organizational case study in four hospitals in the Netherlands and the United States (Magnet, Magnet-related and non-Magnet) was conducted to explore NMMs’ supporting role behavior. Bourdieus concepts of habitus, dispositions, field and capital guided the analysis. Eight dispositions constitute NMMs habitus. A caring, clinical and scientific disposition enhance NMMs’ capital in particular organizations-as-fields. Further research is necessary to link Magnet (related) program characteristics to various configurations of dispositions of NMMs habitus.