In case people start drooling over that post:
He was
Under-Secretary General for Communications and Public Information
Some senior posts within the UN System have the equivalent rank of Under-Secretary-General but are either not entitled or choose not to use the formal title. The most prominent example of this is the Administrator of the
United Nations Development Programme, who is often referred to as the third most senior official within the UN System yet does not use the title of Under-Secretary-General.
With
over 50 people with the rank of Under-Secretary-General, unsurprisingly the influence and power they wield within the UN System varies dramatically.