Bart Demosky's resignation from Suncor is effective Dec. 27 and he'll become CP's chief financial officer the next day.
Demosky joined Suncor in 2006 as a vice-president and has been the company's CFO since 2009.
He holds a degree in economics from the University of Calgary and is a graduate of the university's management development program.
He'll replace Brian Grassby, whose retirement from Canadian Pacific was announced previously.
Canadian Pacific says Demosky was selected after an extensive North American search and he'll play a key role in strategic planning.
Suncor says it'll announce a replacement for Demosky "in due course."