ADJ

government
education, health, social services, etc.
fire, police
The Tokyo police department is clamping down on organized crime

DEPARTMENT + NOUN

official, spokesman, spokesperson, spokeswoman, staff

PREP

~ of
the Department of the Environment

ADJ

accident and emergency, casualty, outpatient, physiotherapy
design, finance, marketing, personnel, planning, publicity, sales, etc.
biology, English, maths, etc.

VERB + DEPARTMENT

manage, run
Staff criticized the way the history department was run

DEPARTMENT + NOUN

head, manager, staff

PREP

in a/the ~
Complaints are dealt with in a different department
within a/the ~
to gain promotion within the department
~ of
the Department of Town Planning

PHRASES

the head of (a) department, a member of a department