The National Aeronautics and Space Administration (NASA) is seeking to procure the design, development, fabrication, alignment, testing, verification, delivery, and post-delivery support services for the Laser Interferometer Space Antenna (LISA) Engineering Test Unit (ETU) telescope. This procurement is critical for NASA's contribution to the European Space Agency (ESA)-led mission, as the LISA ETU telescope is essential for transferring laser power across 2.5 million kilometers between spacecraft. The contract is intended to be awarded as a sole source to L3Harris Technologies, Inc., due to their extensive prior involvement and expertise in the LISA project, which began with a design study in 2018. Interested organizations may submit their capabilities and qualifications to Contracting Officer Stefan Flessa at stefan.d.flessa@nasa.gov by 5:00 PM EDT on May 21, 2025, for consideration in determining whether to conduct a competitive acquisition.