1. Air Quality Consultant, Danville, CA, USA
2. Air Pollution Control Officer and Executive Director, Sacramento Metropolitan Air Quality Management District, Sacramento, CA, USA
3. Executive Engineer, Toyota Motor North America, Inc., Ann Arbor, MI, USA
4. Desert Research Institute, Reno, NV, USA
5. State Key Laboratory of Loess and Quaternary Geology (SKLLQG), Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, People’s Republic of China
6. Glenn E. Futrell Distinguished University Professor of Environmental Engineering, Department of Civil, Construction, and Environmental Engineering, North Carolina State University, Raleigh, NC, USA
7. Director of Science, Health Effects Institute, Boston, MA, USA
8. Meteorology and Measurements Division, Bay Area Air Quality Management District, San Francisco, CA, USA
9. Consultant on Clean Transportation, Arlington, VA, USA