Mark Janssen

Emissions Director/System Administrator

P: 847-720-7882
@: janssen@ladco.org

Mark Janssen has been the Emissions Director at LADCO for over 25 years. He helped implement the first emissions models at LADCO for the LMOS project and was a lead emissions inventory developer for the Ozone Transport Assessment Group(OTAG) and Regional Haze process. He currently leads the Marine and Rail groups of the inventory 2016 Emissions Inventory Collaborative.  He received his BS in Geography from the University of Wisconsin – Madison.



BS Geography – University Of Wisconsin – Madison

Professional Experience

February 1991 – August 1993 – Wisconsin Department of Natural Resources

August 1993 – Present Emissions Director, LADCO


Air & Waste Management Association


  • Emissions Modeling
  • Freight impacts on air quality
  • Onroad motor vehicle emissions
  • Linux administration and Amazon Web Services for scientific computing
  • Electric Utility Emissions controls and projection
  • Emissions and Air Quality Mapping and visualization