During his career, Bergan supervised the design and construction of highways – many in previously undeveloped regions in north and northeastern Saskatchewan.
An estimated 500 miles of Saskatchewan highway were built under his supervision through challenging terrain such as permafrost and muskeg.
[citation needed] In the late 1970s, Bergan developed a weigh-in-motion scale capable of weighing trucks traveling at highway speeds.
This technology led to the formation in 1980 of International Road Dynamics (IRD), a Saskatoon company specializing in weigh-in-motion, commercial vehicle operation enforcement, and intelligent transportation systems.
He was appointed president of the Canadian Technical Asphalt Association, and served as assistant dean of the College of Engineering from 1978 to 1983.