over 14% of employment and the areas of "Architectural, Engineering and Design Services" and "Management, Scientific and Technical Services" employment levels far exceed Canadian levels. Though Trade employs 14.7% of the work force, its percentage of total employment is not higher than the Canadian average. Levels of employment in Construction are both fairly high, exceed Canadian averages, and have grown 16% between 2006 and 2010. Health and Welfare services, which account for 10% of employment, have grown 20% in that period.
Calgary Economic Development "Top Calgary Employers" (2006) lists top employers as such: large industrial employers include Nova Chemicals leading this category with 4,900 employees while others with more than 2,000 employees include Nexen, Canadian Pacific Railway, CNRL, Shell Canada and Dow Chemical Canada. Other private sector employers include Shaw Communications (7,500 employees), along with Telus, Mark's Work Wearhouse, and Calgary Co-op. In the public sector, the largest employer is the Calgary Zone of the Alberta Health Services (22,000). The City of Calgary (15,000), the Calgary Board of Education and the University of Calgary are also large employers.
Calgary is increasingly becoming home to Canadian corporate head offices. It has the second highest concentration of head offices in Canada, behind only Toronto, and has the highest head office employment per capita in the country. Some large employers with Calgary head offices include Canada Safeway Limited, Westfair Foods Ltd., Suncor Energy, Agrium, Flint Energy Services Ltd., Shaw Communication, and Canadian Pacific Railway. CPR moved its head office from Montreal in 1996 and Imperial Oil moved from Toronto in 2005. EnCana's new 58-floor corporate headquarters, the Bow, will become the tallest building in Canada outside of Toronto.
WestJet is headquartered close to the Calgary International Airport, and Enerjet has its headquarters on the airport grounds. Prior
