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
![Wayne Hale potrait](https://www.nasa.gov/wp-content/uploads/2015/06/hale-1.jpg?w=783)
N. Wayne Hale, Chair Human Exploration and Operations Committee
NASA (Ret.), Consultant, Special Aerospace Services
![Photo of Dr. Ellen D. Williams](https://www.nasa.gov/wp-content/uploads/2023/07/ellen-williams-1.jpg?w=500)
Dr. Ellen Williams, Chair Science Committee
Distinguished University Professor and Director, Earth Systems Science Interdisciplinary Center, University of Maryland
![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