[hold] office
1
to occupy an official or formal position in a government, organization, or institution, typically for a specific term or period
- He was elected to hold office as the mayor of the city.
- He has held office as the chairman of the board for over a decade.
- The president will hold office for a four-year term.
- She is the first woman to hold office as the CEO of this company.
- Many people aspire to hold office as members of parliament.