Q. Can a nurse serve during Chol-Hamoed Pesach meals that contain Chometz to non Jewish patients.
A. It is forbidden for a Jewish nurse to prepare or serve meals that contain chometz during Pesach, even to non-Jewish patients. There are a number of prohibitions involved, such as "Mistaker B'isurei Hanoe" or deriving benefit from proscribed items and desiring their existence (O.C.450, 4 - M."B. 9), Also we should be concerned that the chometz may be eaten or tasted during the process (Mishne Berurah ibid. 21). Poiskim recommend that somebody whose occupation requires the handling or providing of chometz food, should ask for a substitute during Pesach or engage in a different task. (Igros Moishe C.M. 4, Yesodei Yeshurun 6, p. 207, Chashukei Chemed, Pesochim p. 190, see also Teshuvos Vehanhogos O.C. 299).
Rabbi A. Bartfeld as advised by Horav Shlomo Miller Shlit"a