T-ESD and ESB Class Alteration Design Support. Please see attached PWS for more details. This opportunity is for SEAPORT NXG MAC HOLDERS ONLY and is a 100% SET ASIDE. No other offers will be considere... T-ESD and ESB Class Alteration Design Support. Please see attached PWS for more details. This opportunity is for SEAPORT NXG MAC HOLDERS ONLY and is a 100% SET ASIDE. No other offers will be considered. SeaPort MAC holders will need to register for PIEE accounts in order to receive solicitations and submit proposals/offers. Solicitation Module - https://pieetraining.eb.mil/wbt/xhtml/wbt/sol/index.xhtml