CORRECTION: An additional contractor has been added to the $249,000,000 multiple-award contract announced on Oct. 15, 2018, for providing resources in support of the Joint Program Executive Office for Chemical and Biological Defense to include its headquarters, directorates and five joint project managers. Edmond Scientific Co., Alexandria, Virginia (W911QY-19-D0015), will also compete for each order of the firm-fixed-price contract. All other information in the contract announcement is correct.