Meet the new chief of staff: Carney appoints diplomatic heavyweight Marc-André Blanchard to steer PMO

Canadian Prime Minister Mark Carney announced on Sunday(June 1) that Marc-André Blanchard, a seasoned diplomat and legal expert, will assume the role of his permanent chief of staff starting in July.

The announcement was made via a post on X (formerly Twitter), where Carney lauded Blanchard's extensive career, stating, “Marc-André has a long and distinguished career as one of Canada’s most accomplished builders, legal experts, executives, public servants, and diplomats.”

Blanchard's appointment brings a wealth of experience to the Prime Minister's Office.

Who is Marc-André Blanchard

He served as Canada's Permanent Representative to the United Nations from 2016 to 2020, where he was instrumental in advancing Canada's international interests. Before his diplomatic tenure, Blanchard was the chairman and CEO of McCarthy Tétrault, one of Canada's leading law firms, and held the position of president of the Quebec Liberal Party from 2000 to 2008. His academic credentials include degrees from the Université de Montréal, the London School of Economics, and Columbia University.

End of Marco Mendicino’s tenure

Blanchard will succeed Marco Mendicino, who has been serving as Carney’s interim chief of staff. Carney expressed his appreciation for Mendicino's service, noting, “Marco Mendicino has my continued appreciation for his service as my Chief of Staff into the early summer.”

David Lametti, Prime Minster’s principal secretary

Former justice minister David Lametti has been confirmed as the Prime Minister’s principal secretary. Lametti, who has been a close advisor to Carney, is expected to play a pivotal role in shaping the government's policy agenda.

These strategic appointments come as Prime Minister Carney, who assumed office in March 2025, seeks to navigate complex domestic and international challenges.