John T. Walker Jr.

U.S. Environmental Protection Agency

Term: 2023-2026

Monitoring and Assessment Team Assignment: Air Resources

STAC Member Since: August 2022

Title: Senior Research Physical Scientist

Department: Office of Research and Development, Center for Environmental Measurement and Modeling

Organization: US Environmental Protection Agency

Education: PhD Soil Science, North Carolina State University 2005; MS Atmospheric Science, North Carolina State University 1998; BS Atmospheric Science, North Carolina State University 1996

Primary Focus Area: Measurement and modeling of trace gas and particle air-surface exchange in agricultural and natural landscapes

Secondary Focus Area(s): Biogeochemical cycling of nitrogen, processes of secondary aerosol formation in the atmosphere, micrometeorology

Career Experiences: 1997 Student Intern, US EPA, Office of Research and Development, National Risk Management Research Laboratory, Durham, NC; 1996-98 Teaching Assistant, Department of Marine, Earth, and Atmospheric Sciences, North Carolina State University, Raleigh, NC; 1996-98 Research Assistant, Department of Marine, Earth, and Atmospheric Sciences, North Carolina State University, Raleigh, NC; 2012-13 Lecturer, Fundamentals of Air Quality and Climate Change, Department of Marine, Earth, and Atmospheric Sciences, North Carolina State University, Raleigh, NC; 1998-2013 Chemist, US EPA, Office of Research and Development, National Risk Management Research Laboratory, Durham, NC; 2013 – Present Senior Physical Scientist, US EPA, Office of Research and Development, Center for Environmental Measurement and Modeling, Durham, NC