Under this 4-year contract, Tetra Tech engineers, analysts, and airspace experts will provide high-end technical solutions to advance the FAA’s Brand New Air Traffic Control System (BNATCS) Air Space Modernization program and support modernizing the National Airspace System through Performance Based Navigation (PBN) initiatives. Tetra Tech will design, develop, and evaluate the impact of routes; manage the environmental screening and compliance process; and establish strategic deconfliction including operational research modeling.