Dennis Hirschbrunner has been in the consulting engineering field for over 35 years. He is a registered Professional Engineer in Nebraska and Iowa.
Hirschbrunner is a member of Chi Epsilon Civil Engineering Honorary Fraternity, National Society of Professional Engineers (where he was selected
the National Young Engineer of the Year in 1980), American Society of Civil Engineers, American Academy of Environmental Engineers, and served as a board member for both American Water Works Association and the Water Environment Federation.
For 10 years he served as the Professional Engineer Representative on the Nebraska Board of Health. He is also an active member of several other professional and technical societies.