Meet US President-elect Joe Biden's cabinet picks

US President-elect Joe Biden and Kamala Harris introduce their nominees and appointees in Wilmington.

RON KLAIN, CHIEF OF STAFF: A longtime Biden adviser with experience in responding to the Ebola pandemic, Klain was picked for the chief of staff role that sets the president's agenda

JOHN KERRY, US CLIMATE ENVOY: President-elect Joe Biden named former Secretary of State John Kerry as special climate envoy, a sign that Biden is putting the issue at the centre of his foreign policy. Kerry will have a seat on the National Security Council in the White House, marking the first time an official in that body will be dedicated to the climate issue. Biden has pledged to reverse course on climate from President Trump, who doubts mainstream climate science and pulled the US out of the 2015 Paris agreement.

AVRIL HAINES, DIRECTOR OF NATIONAL INTELLIGENCE: Avril Haines, tapped by President-elect Joe Biden to be the top US spy, is a former CIA No. 2 who would be taking over as the chief of a US intelligence community beset by low morale and charges it has been used for political attacks. A lawyer from New York, judo brown belt and pilot, Haines is the first woman director of national intelligence, a post created after the 9/11 attacks to coordinate 17 US intelligence agencies.

LINDA THOMAS-GREENSFIELD, US AMBASSADOR TO UN: President-elect Joe Biden’s pick to be his ambassador to the United Nations in New York will have to tackle Washington’s waning leadership at the world body in the face of a more assertive China, diplomats and analysts said. Biden nominated veteran US diplomat Linda Thomas-Greenfield and restored the post to a Cabinet role. She is a 35-year veteran of the US Foreign Service who has served on four continents, perhaps most notably in Africa.

JANET YELLEN, TREASURY SECRETARY: Joe Biden is expected to tap former Federal Reserve Chair Janet Yellen as US Treasury Secretary, putting a woman in the job for the first time. With Yellen, 74, Biden has chosen an experienced policymaker respected by Congress, international finance officials, progressives and business interests, and one that has called for opening fiscal spending taps to boost economic recovery. Yellen has called for increased government spending to boost the US economy out of the pandemic recession.

JAKE SULLIVAN, NATIONAL SECURITY ADVISER: With Biden set to appoint Jake Sullivan as national security adviser, he will be one of the youngest NSAs in US history. Sullivan, 43, has been advising Biden on domestic policy, but has an extensive foreign policy background. He served as Biden’s national security adviser during President Barack Obama’s second term and was a head of policy planning and deputy chief of staff to Hillary Clinton when she was secretary of state.

ANTONY BLINKEN, SECRETARY OF STATE: A longtime Biden confidant who served as No. 2 at the State Department and as deputy national security adviser in President Barack Obama's administration, Blinken was named Biden's choice for secretary of state.

ALEJANDRO MAYORKAS, DHS SECRETARY: Alejandro Mayorkas is a former head of Citizenship and Immigration Services who would become the first Latino and immigrant to lead an agency that has played a central role in Trump’s widely criticised border crackdown. Under Obama, Mayorkas had a key role in developing and shepherding the Deferred Action for Childhood Arrivals Programme, or DACA, which came under fire as soon as Trump took office.