Suncor chief executive Steve Williams will retire at the Canadian energy firm’s annual general meeting in May.
Chief operating officer Mark Little will take over from Mr Williams.
Suncor chairman Mike Wilson said: “Steve has demonstrated exceptionally strong leadership as president and chief executive officer at Suncor.
“Steve has been with Suncor for 16 years and has a long list of contributions, including leading the company in achieving greater reliability, profitability and environmental and safety improvement through operational excellence and ensuring the long-term resilience of the company.”