Do United Nations staff work until retirement?

Yes.

United Nations staff are capable until they retire. At the United Nations Headquarters in New York, some staff members reach the mandatory retirement age of 62 every month.

The United Nations stipulates that the retirement age for staff members who joined before January 1, 1990 is 60 years old, and the retirement age after that is 62 years old. Plans are currently underway to change the age limit to 65 from 2016 or 2017.