archsteward
/ˈɑːrktstwɑrd/Definitions
1. noun
A high-ranking steward or butler, typically in charge of managing a large household or estate.
“The archsteward had been in charge of the estate’s finances for over a decade.”
2. noun
A person who serves in a high-ranking position of responsibility or authority.
“The archsteward of the community center oversaw the management of all its programs.”