NAC Committee Chairs
![Dr. John-Paul Clarke, Professor and Ernest Cockrell, Jr. Memorial Chair in Engineering The University of Texas at Austin](https://www.nasa.gov/wp-content/uploads/2022/06/john-paul-clarke-bio_june-21-2022.jpg?w=1024)
Dr. John-Paul Clarke, Chair Aeronautics Committee
Professor and Ernest Cockrell, Jr. Memorial Chair in Engineering, The University of Texas at Austin
![Portrait of Lynn F. H. Cline](https://www.nasa.gov/wp-content/uploads/2024/08/nac-lynn-cline-2024-8514.jpg?w=1024)
Lynn F.H. Cline, Chair Human Exploration and Operations Committee
Deputy Associate Administrator for Human Exploration and Operations (Retired)
![Amanda Hendrix portrait](https://www.nasa.gov/wp-content/uploads/2024/08/amanda-hendrix-author-photo.jpg?w=736)
Dr. Amanda R. Hendrix, Chair Science Committee
Senior Scientist, Planetary Science Institute,
![Daniel Dumbacher](https://www.nasa.gov/wp-content/uploads/2020/03/dan-dumbacher_hires.jpg?w=964)
Daniel L. Dumbacher, Chair STEM Engagement Committee
Executive Director, American Institute of Aeronautics and Astronautics (AIAA)
![Michael Johns, Vice President, Engineering, Southern Research](https://www.nasa.gov/wp-content/uploads/2022/01/nac-michael-johns_crop.jpg?w=977)
Michael Johns, Chair Technology, Innovation and Engineering Committee
Senior Vice President, Kratos SRE