(1) Background: In the face of persistent and chronically weak labour markets, Atlantic Canada has become increasingly dependent on mobile oil work in Northern Alberta for employment and income. In the regions, most intensely engaged in this form of employment, mobile oil work has largely replaced the dominant industries of the previous century. This geographic shift in Canadian investment and production has created uneven labour markets, with high demand for labour in the Northern Alberta and high unemployment in de-industrialized communities in Atlantic Canada. (2) Methods: There is little quantitative evidence on the flows of mobile workers from the East to the West and the impact of this movement on the Atlantic Canadian economy. Data for this paper were obtained through a special arrangement with Statistics Canada in the fall of 2015 and winter of 2016, from the Canadian Employer–Employee Dynamics Database (CEEDD). (3) Results: Analysis of CEEDD revealed that the oil and gas industry of Northern Alberta has a significant impact on the economies of Atlantic Canada with an increasing dependence for interprovincial workers. (4) Conclusions: To the extent that mobile work has served as a replacement for traditional industries, mobile work is re-structuring the social and economic makeup of Atlantic Canadian communities. The more reliant Atlantic Canadian communities become on oil-related mobile work, the more precarious their economies will become as global markets for oil and gas change and targeted actions on climate change increase.

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