Whissell was founded in Calgary in 1970 as a water and sewer contractor. Today Whissell operates five divisions, three office ... s and over 400 employees and more than 350 pieces of heavy equipment, highway tractors and trailers. Our success is because of our people. They combine decades of experience with a commitment to our core values and dedication to responding to the changing needs of our valued clients. Major clients include land developers, municipal governments, mining, oil & gas and other private sector clients. Watch us and follow us as we continue to grow! 50 years and going strong! read more