operations officer (S3)

field officer (field-grade officer / senior officer)

operations and training officer

operations officer's estimate

Special Operations Liaison Officer (SOLO)

operations duty officer

Joint Information Operations Center /Joint Intelligence Operations Center (JIOC)

special operations forces operations (SOFOPS)

surface-to-air missile operations center / SAM operations center (SAMOC)

air-ground operations operations section

above water warfare officer

Air Force Officer Training School

air liaison officer (ALO)

air officer`s guide

airlift duty officer

anti-submarine warfare officer

Army Officer Candidate School

assignment officer

calling officer

career officer

chemical officer

chief information officer (CIO)

Chief Petty Officer (CPO)

Chief Staff Officer

chief warrant officer

commanding officer (CO)

commissioned officer (ComO)

communications officer

control organization officer

duty officer

executive officer (XO)

fighter duty officer

fire support officer (FSO)