Nexen confirmed it would cut 120 jobs as it battles disputed operations and faltering oil prices.
A company spokesperson said: “Given the current economic reality, we have made the difficult decision to reduce our workforce.
“We take these decisions seriously, and all impacted employees have been treated fairly and with respect.”
The firm’s Long Lake oil-sands operations were shut-in after an explosion in January. A previous oil spill forced a separate shut-in last September.
The latest batch of job cuts follows last year’s cull, which saw 340 staff in North America and 60 job for its UK North Sea operations cut.