The National Science Foundation (NSF) requests recommendations for membership for its scientific and technical Federal advisory committees. Self recommendations are accepted.  NSF will keep recommendations active for 12 months from the date of receipt.

Each Directorate and Office has an external advisory committee that typically meets twice a year to review and provide advice on program management, discuss current issues and review and provide advice on the impact of policies, programs, and activities in the disciplines and fields encompassed by the Directorate or Office.

In addition to Directorate and Office advisory committees, NSF has several committees that provide advice and recommendation on specific topics: astronomy and astrophysics; environmental research and education; equal opportunities in science and engineering; performance assessment; and business and operations.

A primary consideration when formulating committee membership is recognized knowledge, expertise, or demonstrated ability. Other factors that may be considered are balance among diverse institutions, regions, and groups underrepresented in science, technology, engineering, and mathematics. Committee members serve for varying term lengths, depending on the nature of the individual committee.

Details re: how and where to submit recommendations can be found in the full Federal Register notice:
Request of Recommendations for Membership for Directorate and Office Advisory Committees - A Notice by the National Science Foundation on 03/22/2012