[19] In fall 2021, Suncor assumed operatorship of the Syncrude Joint Venture oil sands project in a bid to improve its performance.

[20] In July 2022, president and CEO Mark Little resigned amid investor pressure and after a series of workplace deaths and safety incidents.

[22] On February 21, 2023, Suncor announced that former Imperial Oil Ltd. president and CEO Rich Kruger had been named its new chief executive officer after a months-long search.

[21] Smith assumed the role of chief financial officer and executive vice-president of corporate development after Suncor's annual general meeting on May 9, 2023.

Suncor operates refineries in Edmonton, Alberta; Sarnia, Ontario; Montreal, Quebec and Commerce City, Colorado.

[26]: 22 Suncor is the world's largest producer of bitumen, and owns and operates an oil sands upgrading plant near Fort McMurray, Alberta, Canada.

The company held a 36.75% interest in the Joslyn north oil sands project which was shelved pending an economic review by operator Total S.A. in May 2014.

A 137,000-barrel-per-day Montreal Refinery produces gasoline, distillates, asphalts, heavy fuel oil, petrochemicals, solvents and feedstock for lubricants.

In addition, the company terminated all of its independent Sunoco franchises, as it planned to implement Petro-Canada's model of requiring franchisees to operate multiple locations.

A group of affected franchisees filed a class-action lawsuit over the matter, claiming that Suncor had violated Ontario's Arthur Wishart Act.

[33] As of February 2023, Suncor Energy owns a Bombardier Global Express (BD-700) and operate as ICAO airline designator JSN, and telephony JETSUN.

[34][35] According to a Pollution Watch fact sheet, in 2007 Suncor Energy's oil sands operations had the sixth highest greenhouse gas emissions in Canada.

On April 2, 2009, Suncor was fined $675,000 for failing to install pollution control equipment at its Firebag operation near Fort McMurray, Alberta in July 2006.

On the same day, Suncor was fined $175,000[38] for dumping untreated wastewater from a company work camp near Fort McMurray into the Athabasca River in 2007.

Employees at Suncor and the nearby Metro Wastewater Reclamation District Plant were exposed to benzene through the air and through drinking water.

The lawsuit was unique as it was one of the first to be based on these effects on a landlocked area, as opposed to those citing Sea level rise as a factor.

[45] In 2020, Suncor reached a US$9 million settlement agreement with authorities in Colorado for more than 100 air pollution violations from its Commerce City refinery.

In 2009, under the auspices of the Natural Sciences and Engineering Research Council of Canada (NSERC), Suncor teamed with the University of Alberta and Matrikon, an Edmonton-based software company, to develop separation-cell technology to potentially reduce the amount of bitumen entering tailings ponds by 50 per cent.