July-November: NSF asks that all interested individuals register in the GRFP Reviewer Registration System.

October/November: Invitations are issued to reviewers. Reviewers respond to invitation to accept or decline service.

Mid November/Early December: Reviewers are required to review the Reviewer Guide and training materials, and attend a virtual orientation session that covers review training, practice reviews, and technology testing. You will have multiple orientation sessions from which to choose.

December: Reviewers assigned their applications. Access granted to an assigned pool of applications. They are available for a period of several weeks.

January (as specified in the formal invitation): Reviewers convene online for a one-day virtual panel to discuss applications.