Presolicitation NATIONAL AERONAUTICS AND SPACE ADMINISTRATION is seeking SPACE R&D SERVICES, SPACE FLIGHT, RESEARCH AND SUPPORTING ACTIVITIES, and BASIC RESEARCH. The purpose of this publication is to provide amendment 23 to the original pre-soliciation NNH16ZCQ001K and the following December 2023 Update. The NextSTEP-2 omnibus contract is being extended through 30 June 2024 to bridge the NextSTEP BAA while NASA finalizes its vision for the next iteration of NextSTEP. Due to SAM.gov system issues, the original pre-soliciation NNH16ZCQ001K was unable to be amended.