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Darrell Sonntag

Assistant Professor
Full-Time Faculty

430E EB
Provo, UT 84602


Darrell Sonntag joined the BYU Civil & Construction Engineering faculty in April 2022. For the previous 12 years, he conducted research and worked as an engineer at the US Environmental Protection Agency’s Office of Air Quality & Transportation. At the US EPA, his primary role was working with other engineers and scientists in developing a vehicle emissions model, the Motor Vehicle Emission Simulator (MOVES), used to estimate the air quality and greenhouse gas impacts of regulations and policies on vehicle emissions. At BYU, Darrell is conducting measurements of vehicle emissions and indoor air quality and modeling the environmental impacts of transportation systems.

Darrell is excited to join students at BYU in pursuit of truth through both science and faith. During his time as a BYU student, Darrell served in the Italy Rome Mission of the Church of Jesus Christ of Latter-day Saints from 2000-2002. He enjoys camping, hiking, biking, and cross-country skiing with his family.

Research Interests

Real-world measurement of vehicle emissions, indoor air quality, and emission and air quality modeling

Teaching Interests

Sustainable infrastructure and transportation, transportation and environmental engineering, air quality, data analysis using programming languages


  • PhD, Civil and Environmental Engineering , Cornell University (2010)
  • Master of Science, Transportation Systems Engineering , Cornell University (2008)
  • Bachelor of Science, Civil Engineering , Brigham Young University (2005)

Professional Citizenship

  • Reviewer, Ad Hoc Reviewer, US Environmental Protection Agency (2023 - 2023)

Courses Taught


Chen Zhang Karen Ficenec Andrew Kotz Kenneth Kelly Darrell B Sonntag Carl Fulper Jessica Brakora Tiffany Mo Sudheer Ballare Claudia Toro Kristen Foley Heather Simon Barron Henderson Kirk R Baker Alison Eyth Brian Timin Wyat Appel Deborah Luecken Megan Beardsley Darrell B Sonntag Norm Possiel Sarah Roberts


Ben Murphy Darrell Sonntag