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Minister of Justice and Attorney General of Canada David Lametti, left and Minister of Public Safety Marco Mendicino speak at an event on Parliament Hill in Ottawa, Wednesday, June 21, 2023.

THE CANADIAN PRESS/Sean Kilpatrick

Carney taps top aide David Lametti to replace Bob Rae as UN ambassador

By The Canadian Press

Published 12:19 PDT, Thu September 18, 2025

Last Updated: 2:19 PDT, Thu September 18, 2025

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Prime Minister Mark Carney is appointing his principal secretary David Lametti as Canada's next ambassador to the United Nations.

The Prime Minister's Office announced Thursday that Lametti, the former justice minister, will replace former Liberal leader Bob Rae, 77, who has held the role since 2020.

Lametti will start in the new diplomatic posting on Nov. 17.

He was brought into Carney's office in July to take on the top role of principal secretary after serving as an adviser during the spring election.

But Tom Pitfield has remained on board as principal secretary since the spring and shared the role with Lametti for weeks.

Pitfield was chief digital strategist to former prime minister Justin Trudeau and is married to Quebec Liberal MP Anna Gainey.

Rae congratulated Lametti on social media, saying he is a great choice for the job.

"I discussed my plan to step down from my five-year assignment with Mark Carney before the summer, and want to thank him, Justin Trudeau, many ministers, my Global Affairs Canada colleagues and my family and friends for their support," Rae posted on X.

"I am staying for a couple of months, and have spoken with David about a good transition."

Lametti is the second Trudeau-era cabinet minister to leave a top role in Carney's office in recent months. His move comes as media reports citing confidential sources say that others are expected to leave for diplomatic postings, including Bill Blair and Jonathan Wilkinson.

Carney's chief of staff Marco Mendicino, a former public safety minister, was replaced by former UN ambassador Marc-André Blanchard, who started working for Carney in July.

When Lametti was justice minister in 2021, he ushered a bill through Parliament that created a legal framework to ensure federal laws are consistent with the United Nations Declaration on the Rights of Indigenous Peoples.

After Trudeau dropped Lametti from his cabinet in 2023, he turned down a diplomatic appointment to Spain. Instead, he took a private-sector job at Fasken Martineau Du Moulin in Montreal as a legal specialist on UNDRIP and digital technology.

The Prime Minister's Office also announced Wednesday that Carney will appoint Vera Alexander, a senior official at Global Affairs, as Canada's next ambassador to Germany.

The previous ambassador to Germany, former B.C. premier John Horgan, passed away late last year.

Alexander, who previously served in postings in London, Washington and Moscow, was most recently an associate assistant deputy minister in the department.

From 2006 to 2008 she served in the Privy Council Office as a senior policy adviser on the war in Afghanistan and from 2017 to 2021 she served as Canada’s deputy permanent representative to NATO.

– Kyle Duggan, The Canadian Press