trustee
noun [ C ]
uk/trʌsˈtiː/ usa person or organization legally chosen to work alone or as part of a group to manage money or property for others:
The pension fund is managed by a 12-member board of trustees.
The CEO, who is responsible for developing overall strategy, reports to a board of trustees.
She was invited to become a trustee for her local wildlife charity.
See also
active trustee
bare trustee
constructive trustee