business manager
US /ˈbɪz.nɪs ˌmæn.ɪ.dʒər/
UK /ˈbɪz.nɪs ˌmæn.ɪ.dʒər/

1.
a person responsible for the overall administration and operation of a business or a specific department within a company
:
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The business manager presented the quarterly financial report.
•
She was promoted to business manager after five years with the company.