department _noun 

ADJECTIVES & NOUNS

government, federal
・The Ministry of Arts & Culture was the government department responsible for museums.

university
・University departments are generally judged by the quality of their research.

biology, English, history, etc.
・He joined the German Department at Stirling University in 1972.

finance, sales, personnel, etc.
・She worked in the sales department of a software company.

outpatient, casualty, physiotherapy, etc.
・I had to go to the physiotherapy department for treatment twice a week.

police, fire
・He is a narcotics officer with the San Francisco Police Department.
・When she saw smoke, she telephoned the fire department.

DEPARTMENT + NOUN
manager 
・After two years, he was promoted to the job of department manager.

official
・A Justice Department official gave details of the case.

staff 
・All department staff will be affected by the new working hours.

PHRASES

the Department of Health/Trade/Education etc., the Department for Health etc.
・My brother works for the Department of Health.

the State Department, the Department of State 
・She was head of Southeast Asian Affairs at the State Department.

the head of a department
・The current head of department is Professor Mary Keen.

a member of a department
・Meetings are open to all members of the department.