Since 30 November 2007, he has been the president and chief executive officer of the Aerospace Industries Association of Canada.

Claude Lajeunesse was born in Quebec City, received a Master of Science degree in 1967 in Nuclear Engineering and a PhD in 1969.

He is a member of the boards of TD Meloche Monnex, Atomic Energy of Canada Limited, the Montreal Board of Trade, and the Canadian Liver Foundation, a Fellow of the Canadian Academy of Engineering, and a member of the Ordre des ingénieurs du Québec.

[2] Lajeunesse has been criticized for "corporatization"[3] of the universities he has headed by emphasizing part-time labor, raising tuition fees,[4] and union busting.

[5] At both Ryerson and Concordia, Lajeunesse's first acts included giving himself a 50% pay raise, and increases of 20-50% for his immediate entourage.