UNESCO management, like that of other multilateral agencies, is concerned that the organization maintains a fair balance of staff from its member nations. It uses a formula to calculate the number of staff members it should have from each nation. In the case of the United States, it has estimated that there should be between 46 and 76 citizens on its staff. There are currently 32. Thus UNESCO might reasonably add another 30 Yanks to its staff!
Both UNESCO and the State Department are seeking qualified U.S. citizens for UNESCO jobs.