Canadian oil and gas pipeline operator Enbridge is firing 5 percent of its workforce, or about 530 jobs in the United States and Canada.

The cuts come a month after the company bought US rival Spectra Energy for $28 billion to create North America's largest energy infrastructure firm with a network of more than 54,000 miles of oil and gas pipelines.

Spokeswoman Suzanne Wilton said the reduction in number of positions, however, "is not related to the Spectra Energy combination."

Rather, it stems from an organizational review started at the beginning of 2016, she said.

"It is focused on what we need to do to achieve our strategy of growth and diversification, enhance our competitiveness, and allow us to capitalize on opportunities now and into the future," she said.

This is the second round of cuts in a year. The company slashed another 5 percent of its work force last November.