trustee
US /ˌtrʌsˈtiː/
UK /ˌtrʌsˈtiː/

1.
fideicomisario, administrador
an individual person or member of a board given control or powers of administration of property in trust with a legal obligation to administer it solely for the purposes specified.
:
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The university appointed a new trustee to oversee its endowment.
La universidad nombró un nuevo fideicomisario para supervisar su dotación.
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As a trustee, she is responsible for managing the family's assets.
Como fideicomisaria, ella es responsable de administrar los bienes de la familia.