Dr. John T. Sullivan is currently serving on detail at NASA Headquarters since Spring 2025 as the Ground-Based Networks and Calibration/Validation Facilities Program Scientist and Deputy Program Manager for the Multi-Source Integrated Observatory. With a background in the Atmospheric Chemistry and Dynamics Laboratory at NASA Goddard Space Flight Center, he previously led the NASA Tropospheric Ozone Lidar Network (TOLNet) project. In his current and ongoing roles, Dr. Sullivan coordinates inter-agency scientific teams to develop high-resolution ozone observations that support satellite data retrievals and improve atmospheric forecast models, including critical validation work for NASA’s TEMPO mission.
Specializing in atmospheric constituent analysis, Dr. Sullivan leverages advanced remote sensing techniques, with focused expertise in lidar (light detection and ranging) technologies for air quality monitoring, satellite validation, and stratospheric trend analysis. He has contributed to the field by designing, calibrating, and deploying transportable lidar systems for precise ozone profile measurements across key NASA research campaigns, including DISCOVER-AQ, KORUS-AQ, TRACER-AQ, AGES+, and various NDACC intercomparison studies. His professional achievements include the NASA Postdoctoral Program (NPP) Fellowship and a 2017 Early Career Scientist recognition for the Ozone Water-Land Environmental Transition Study (OWLETS).