executive officer (XO)

начальник штабу (батальйону, бригади); старший / відповідальний / черговий / оперативний офіцер (в оперативному центрі тощо); старший (перший) замісник командира; старпом

company executive officer

field officer (field-grade officer / senior officer)

Assistant Secretary General for Executive Management

Defense Acquisition Executive (DAE)

Executive Committee (ExCom)

executive coordinator

project executive office (PEO)

Service Acquisition Executive (SAE)

executive management responsibility (EMR)

Executive Steering Committee on Helicopter Maintenance

platoon executive

special operations executive

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

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