Paul Gradl is a principal engineer and subject matter expert at the NASA Marshall Space Flight Center (MSFC) in Huntsville, Alabama. Mr. Gradl serves as a Principal Investigator and leads several projects for additive manufacturing of liquid rocket engine engines and supports a variety of development and flight programs over the last 18 years. He authored and co-authored over 90 journal articles and conference papers; published a book under AIAA “Metal Additive Manufacturing for Propulsion Applications” in 2022; holds five patents; and regularly teaches courses in additive manufacturing. Gradl is the recipient of numerous NASA and industry awards and medals; an Associate Fellow of American Institute of Aeronautics and Astronautics (AIAA), member of SME, and serves on several additive manufacturing industry and government committees and as an advisor to industry. Gradl was named one of “The Most Influential Personalities of Additive Manufacturing in 2020” and the recipient of “Engineer of the Year” by AIAA in 2022.