Field missions are composed of three different categories of personnel:
1. The military component includes contingents and seconded military officers provided by troop-contributing countries.
2. The police component includes formed police units and individual police officers, generally provided by police-contributing countries.
3. The civilian component includes the following:
Senior leadership consists of special representatives of the secretary-general (SRSGs) and deputy special representatives of the secretary-general (DSRSGs), mostly at the level of under-secretary-general or assistant secretary-general, who are appointed by the secretary-general.
Professional categories of personnel (P2–P5 and D1–D2 levels) are recruited internationally. Professional and higher categories represent more than a third...