Staff will have 10 days to express their interest for any of the positions, which range in seniority from the lowest professional rank to the grade immediately below Assistant Secretary-General, once they are advertised, Mr. Ban’s spokesperson Michele Montas said.

In a letter to staff, to be published on the UN’s internal web portal, Mr. Ban said “as I undertake these efforts to lead by example, I look to all senior managers to follow suit and promote mobility among their staff, beyond the requirements of managed mobility.”