Directorate and office advisory committees
Each of NSF's directorates and offices has an external advisory committee that typically meets twice a year to review and advise on its programs. Several additional committees advise on specific topics, such as equal opportunities in science and engineering and business and operations.
Committees of visitors
NSF's committees of visitors assess the quality and integrity of the foundation's program operations and program-level technical and managerial matters pertaining to proposal decisions. These reviews are conducted at regular intervals, approximately every four years.