This document provides details for a federal contract solicitation. The Naval Air Warfare Center Aircraft Division at Webster Outlying Field is seeking to award a follow-on contract to provide Command, Control, Communications, Computers, Combat systems, Intelligence, Surveillance, and Reconnaissance engineering support services for systems used by various military branches and agencies. The incumbent contractor provides systems engineering and lifecycle support for C5ISR systems installed on various platforms including aircraft, vehicles, mobile and fixed communications equipment, and command centers. Eligible offerors must submit proposals in response to solicitation number N00421-21-R-0116 by the final request for proposals release date. The Naval Air Systems Command is the contracting agency overseeing this opportunity.