High Quality Content by WIKIPEDIA articles! A Warrant Officer (WO) is a member of a military organization holding one of a specific group of ranks.The rank was first used in the (then) English Royal Navy and is today used in many other countries, essentially the Commonwealth and USA. Outside the USA they are effectively senior non-commissioned officers with long military experience, although technically in a class of their own between NCOs and commissioned officers.However in the United States, warrant officers are technical leaders and specialists. They may be technical experts with long service. Alternatively, they may be direct entrants, notably for U.S. Army helicopter pilots.For comparison, in Germany, the Army rank of Hauptfeldwebel and above is similar to a British Army Warrant Officer; in France, the "Adjudant" and "Major" occupies a similar role.