
An aide-de-camp is a personal assistant or secretary to a person of high rank, usually a senior military, police or government officer, or to a member of a royal family or a head of state.

An air attaché is an Air Force officer who is part of a diplomatic mission; this post is normally filled by a high-ranking officer.

A despatch rider is a military messenger, mounted on horse or motorcycle.

A duty officer or officer of the day is a position that is assigned to a worker on a regularly rotational basis. While on duty, duty officers attend to administrative tasks and incidents that require attention regardless of the time of day, in addition to the officer's normal duties. Duty officers are typically assigned to work for a period of time such as 24 to 48 hours, after which he will be relieved by the next duty officer listed on a roster. The outgoing duty officer will turn over relevant data and documentation to the incoming duty officer about the previous day's happenings before returning to his normal duties or resting.

A military attaché is a military expert who is attached to a diplomatic mission, often an embassy. This post is normally filled by a high-ranking military officer who retains his commission while serving in an embassy. Opportunities sometimes arise for service in the field with military forces of another sovereign state.

A military attaché is a military expert who is attached to a diplomatic mission, often an embassy. This post is normally filled by a high-ranking military officer who retains his commission while serving in an embassy. Opportunities sometimes arise for service in the field with military forces of another sovereign state.

The Quartermaster General of the United States Army is a general officer who is responsible for the Quartermaster Corps, the Quartermaster branch of the U.S. Army. The Quartermaster General does not command Quartermaster units, but is primarily focused on training, doctrine and professional development of Quartermaster soldiers. The Quartermaster General also serves as the Commanding General, U.S. Army Quartermaster Center and School, Fort Lee, Virginia and the traditional Quartermaster Corps. The office of the Quartermaster General was established by resolution of the Continental Congress on 16 June 1775, but the position was not filled until 14 August 1775. Perhaps the most famous Quartermaster General was Nathanael Greene, who was the third Quartermaster General, serving from March 1778 to August 1780. The first Quartermaster General to serve in the U.S. Army was Thomas Mifflin of Pennsylvania.