The U.S. Army Corps of Engineers, Engineering and Support Center, Huntsville Center (CEHNC) plans to award a multiple award Indefinite Delivery Contract (IDC) using full and open competition (unrestricted. Firms will be selected for negotiation based on demonstrated competence and qualifications for the required work. The multiple award IDC suite will have one 24-month base ordering period and three 12-month option period for a total of (5) years. Work will be issued by negotiated Firm-Fixed-Price (FFP) task orders (TO). CEHNC intends to award a target of four (4) IDCs for this acquisition; however, the Government reserves the right to award more, less(minimum of 3), or none at all if it is determined to be in the best interest of the Government. (Amendment 0001) The purpose of the amendment is to extend the posting date from Aug 19, 2024 to Aug 20, 2024 and revise the synopsis based on questions from industry. Changes are highlighted however, it is the contractors responsibility to read the document in its entirety.