head of business department; business department manager
A specific job title in a company, referring to the manager or section chief of the business operations department.
He was promoted to head of the business department.
As the business department manager, I am in charge of the new project.
課長 is a general term for section chief or manager, while 業務課長 specifies the business operations department.
部長 is a higher position, department head, while 課長 is a section chief within a department.
Compound of 業務 (business operations) and 課長 (section chief).