- Meet the Inventor - 

Dr. J. Stewart Hager

Dr. J. Stewart Hager brings technological innovation into the stagnant emissions industry with his ingenuity and extensive experience of 25 years. His entrepreneurial spirit, along with his focus and determination, has enabled him to significantly impact the world of emissions today.


J. Stewart Hager, Chief Executive Officer and inventor, received his Ph.D. in Molecular Physics from the University of Tennessee - Knoxville. Dr. Hager has many achievements in high-resolution infrared spectroscopy, molecular vibrational-rotational theory, atmospheric  remote sensing, Raman spectroscopy, and computer modeling of atmospheric spectra, instrument design, and enhancement. He is also a published author with articles in major scientific journals.


Before starting Hager Environmental, Dr. Hager worked as a consultant alongside a select group of four other physicists, three of whom were NASA Langley scientists on the Active Sensing of CO2 Emissions over Nights, Days and Seasons (ASCENDS) satellite mission for NASA Langley.

Using his knowledge and experience in molecular physics,  Dr. Hager started Hager Environmental and Atmospheric Technologies (HEAT), in Knoxville, Tennessee, in 2009. His current primary focus is on using principles similar to the ASCENDS satellite mission and applying it to vehicle exhaust remote sensing. In connection with his mission, Dr. Hager has developed a full production version of a vehicle exhaust remote sensing device called EDAR (Emissions Detection and Reporting), which has successfully been launched in commercial applications worldwide.

Dr. Hager (left) speaking with the city of Paris Deputy Mayor of Transportation and Public Space, Christophe Najdovski (right) from an article in Le Parisien .

“Science knows no country, because knowledge belongs to humanity, and is the torch which illuminates the world.” 
– Louis Pasteur 

Hager Environmental &

Atmospheric Technologies (HEAT)

+1 865-288-7890

US Headquarters:

539 Milwaukee Way

Knoxville, TN 37932

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