Donald Trump made the first official hire of his incoming administration, announcing 2024 campaign co-chair Susan Summerall Wiles as his chief of staff.

The president-elect’s transition team is already vetting a series of candidates ahead of his return to the White House on 20 January 2025.

Many who served under Trump in his first term do not plan to return, though a handful of loyalists are rumoured by US media to be making a comeback.

The 78-year-old Republican is also surrounded by new allies who could fill his cabinet, staff his White House and take up other key roles across government.

Here is a closer look at names in the mix for the top jobs.

Susie Wiles and campaign co-chair Chris LaCivita were the masterminds behind Trump’s victory over Kamala Harris.

In his victory speech on Wednesday, he called her “the ice maiden” – a reference to her composure – and said she “likes to stay in the background”.

Wiles was confirmed the next day as the first appointee of his second term – as his White House chief of staff. She will be the first woman ever to hold that job.

Chief of staff is often a president’s top aide, overseeing daily operations in the West Wing and managing the boss’s staff.

Wiles, 67, has worked in Republican politics for decades, from Ronald Reagan’s successful 1980 presidential campaign to turning businessman Rick Scott into Florida’s governor in just seven months back in 2010.

Republicans have said she commands respect and has an ability to corral the big egos of those in Trump’s orbit, which could enable her to impose a sense of order that none of his four previous chiefs of staff could.

No personnel decision may be more critical to the trajectory of Trump’s second term than his appointee to lead the Department of Justice.

After uneven relationships with both Jeff Sessions and William Barr, the attorney generals during his first term, Trump is widely expected to pick a loyalist who will wield the agency’s prosecutorial power to punish critics and opponents.

Among the names being floated for the cabinet post are Texas Attorney General Ken Paxton, who has been both indicted and impeached like Trump; Matthew Whitaker, the man who took over for three months as acting attorney general after Sessions stepped down at Trump’s request; Mike Davis, a right-wing activist who once clerked for Supreme Court Justice Neil Gorsuch and has issued bombastic threats against Trump critics and journalists; and Mark Paoletta, who served in Trump’s budget office and argues there is no legal requirement for a president to stay out of justice department decisions.

The secretary of homeland security will take the lead in enforcing Trump’s promises of deporting undocumented migrants en masse and “sealing” the US-Mexico border, as well as leading the government response to natural disasters.

Tom Homan, Trump’s former acting director of Immigration and Customs Enforcement (Ice), stands out as the most likely pick.

Homan, 62, supported separating migrant children from their parents as a means to deter illegal crossings and has said politicians who support migrant sanctuary policies should be charged with crimes. Though he resigned in 2018, midway through the Trump presidency, he remains a proponent of the Trump approach on immigration.

Chad Wolf, who served as acting homeland secretary from 2019-20 until his appointment was ruled unlawful, and Chad Mizelle, the homeland department’s former acting general counsel, are also potential contenders.

Stephen Miller, widely considered to be the architect of Trump’s immigration agenda, is expected once again to play a senior advisory role with the White House.

The US secretary of state is the president’s main adviser on foreign affairs, and acts as America’s top diplomat when representing the country overseas.

Florida Senator Marco Rubio – who was most recently under consideration to be Trump’s vice-president – is a major name being floated for the key cabinet post.

Rubio, 53, is a China hawk who opposed Trump in the 2016 Republican primary but has since mended fences. He is a senior member of the Senate foreign relations committee and vice-chairman of the chamber’s select intelligence panel.

Other contenders for the job include Trump’s former national security adviser Robert O’Brien; Tennessee Senator Bill Hagerty, who was previously Trump’s ambassador to Japan; and Brian Hook, the hawkish special envoy to Iran in Trump’s first term and the man who is leading the transition effort at the State Department.

A dark horse for the nomination, however, is Richard Grenell, a loyalist who served as ambassador to Germany, special envoy to the Balkans and acting national intelligence chief. Grenell, 58, was heavily involved in Trump’s efforts to overturn his 2020 election defeat and even sat in on his private meeting with Ukrainian President Volodymyr Zelensky in September.

Grenell’s combative style may make him a better fit for national security adviser – a position that does not require Senate confirmation – than secretary of state.

Also in line for major posts in a second Trump term are former Director of National Intelligence John Ratcliffe; Keith Kellogg, a national security adviser to Trump’s first Vice-President Mike Pence; former defence department official Eldridge Colby; and Kash Patel, a loyalist who staffed the national security council and became chief of staff to the acting secretary of defence in Trump’s final months in office.

Patel, 44, who helped block the transition to the incoming Joe Biden administration in the latter role, is tipped to become the Central Intelligence Agency (CIA) chief.

Trump has also said he would fire Federal Bureau of Intelligence (FBI) Director Chris Wray, who he nominated in 2017 but has since fallen out with. Jeffrey Jensen, a former Trump-appointed US attorney, is under consideration to replace Wray.

Two names being discussed are Michael Waltz, a Florida lawmaker who sits on the armed services committee in the US House of Representatives, and Robert O’Brien.

Trump has ruled out Mike Pompeo, who was an early favourite to head up the Pentagon.

Former CIA director Pompeo served as secretary of state during Trump’s first presidency, when he led the administration’s diplomatic blitz in the Middle East.

During Trump’s first term, New York Congresswoman Elise Stefanik transformed from a moderate to a vocal backer. The fourth-ranking House Republican leader has remained one of Trump’s most fiercely loyal defenders on Capitol Hill – which makes her a leading contender to represent him in unfriendly territory at the United Nations.

But she may find herself competing for the position with the likes of former State Department spokeswoman Morgan Ortagus; David Friedman, Trump’s ambassador to Israel; and Kelly Craft, who served as UN ambassador at the end of Trump’s term.

Trump is reportedly considering Robert Lighthizer, a free trade sceptic who led the tariff war with China as the US trade representative, as his chief financial officer.

But at least four others may be under consideration for the role, including Scott Bessent, a billionaire hedge fund manager who has become a major fundraiser and economic adviser to the president-elect; John Paulson, another megadonor from the hedge fund world; former Securities and Exchange Commission (SEC) chair Jay Clayton; and Fox Business Network financial commentator Larry Kudlow, who ran Trump’s national economic council during his first term.

The woman co-chairing Trump’s transition team, Linda McMahon, is tipped as a key contender to represent US businesses and job creation in his cabinet – after previously serving as small business administrator during his first term.

Others who could fill this vacancy include Brooke Rollins; Robert Lighthizer; and Kelly Loeffler, a wealthy businesswoman who briefly served in the US Senate.

South Dakota Governor Kristi Noem – who was passed over to be Trump’s running mate over a bizarre admission that she killed her pet dog – could see her loyalty to him pay off with the leadership of the interior department, which manages public land and natural resources.

She may compete with North Dakota Governor Doug Burgum for the role.

Doug Burgum is also a contender to lead the energy department, where he would implement Trump’s pledges to “drill, baby, drill” and overhaul US energy policy.

A software entrepreneur who sold his small company to Microsoft in 2001, Burgum briefly ran in the 2024 Republican primary before dropping out, endorsing Trump and quickly impressing him with his low-drama persona and sizeable wealth.

Former energy secretary Dan Brouillette is also reportedly in the running.

Karoline Leavitt, 27, who impressed Trump as his campaign’s national press secretary, has already served as an assistant White House press secretary and may be a shoo-in to be the administration’s spokesperson.

RFK Jr, as he is known, is an environmental lawyer by trade, a vaccine sceptic by fame and the nephew of former President John F Kennedy.

He is on a shortlist to run the heath and human services department, multiple people close to the president-elect’s campaign told CBS News, the BBC’s US news partner.

Despite having no medical qualifications to his name, Kennedy, 70, is expected to become a kind of “public health star” in the Trump administration.

Democratic Party attacks on Kennedy’s credentials are not likely to carry much weight, as control of the US Senate is in the hands of Republicans and confirming Kennedy to any cabinet-level post will not require Democratic support.

Besides a new job at the health and human services department, Kennedy could also influence policy at the agriculture department, the Environmental Protection Agency, the Centers for Disease Control and Prevention (CDC), and the Food and Drug Safety Administration (FDA).

The world’s richest man poured millions of dollars into re-electing Trump and critics say he will now have the power to shape the regulations that affect his companies Tesla, SpaceX and X.

Both he and Trump have focused on the idea of him leading a new “Department of Government Efficiency”, where he would cut costs and streamline what he calls a “massive, suffocating federal bureaucracy”.

The would-be agency’s acronym – DOGE – is a playful reference to a “meme-coin” cryptocurrency Musk has previously promoted.

But Musk, 53, could also play a role in global diplomacy. He participated in Trump’s first call with Ukraine’s Zelensky on Wednesday.