President-elect Donald Trump appoints cabinet members to his administration.

Cabinet appointees will have a direct impact on the implementation of Trump’s policies in his second term.

President-elect Donald Trump is expected to announce his intention to nominate Sen. Marco Rubio, R-Fla., for secretary of state, according to multiple sources familiar with the matter, ABC News reported Monday night.

Rubio, 53, has served in the Senate since 2011. He currently serves as the vice chairman of the Senate Select Committee on Foreign Intelligence and also serves on the House Foreign Relations Committee.

Several longtime State Department officials tell ABC News they respect Rubio’s extensive foreign policy experience and see him as unlikely to politicize the role of secretary of state too much.

Rubio was also said to be favored for the role by Trump chief of staff and veteran Florida political operative Susie Wiles, potentially helping the lawmaker overcome early Trump administration loyalists such as former Acting Director of National Intelligence Richard Grenell and former National Security Adviser Robert. O’Brien.

Here’s a look at the president-elect’s other appointees so far.

Susie Wiles

Trump’s future chief of staff at the White House, veteran Florida political strategist Susie Wileshe is moving from a largely behind-the-scenes role as campaign co-chairman to the high-profile position of the president’s closest adviser and counselor.

A chief of staff serves as the president’s confidante, helping to execute an agenda and balancing competing political and policy priorities. They also tend to serve as a gatekeeper, helping determine who the president spends time with and who he speaks to — an effort Trump has chafed under inside the White House.

The daughter of NFL player and sports reporter Pat Summerall, Wiles worked in the Washington office of New York Representative Jack Kemp in the 1970s. This was followed by stints on Ronald Reagan’s campaign and in the White House as a programmer.

Wiles then headed to Florida, where he advised two Jacksonville mayors and worked for Representative Tillie Fowler. That was followed by statewide campaigns in Florida’s rough and tumble politics, with Wiles credited with helping businessman Rick Scott win the governor’s office.

After briefly managing Utah Gov. Jon Huntsman’s 2012 presidential campaign, she led Trump’s 2016 effort in Florida, when his victory in the state helped him win the White House.

Two years later, Wiles helped Ron DeSantis get elected governor of Florida. But the two would develop a rift that ultimately led DeSantis to urge Trump’s 2020 campaign to cut ties with the strategist when she was again running the then-president’s state campaign.

Wiles eventually ran Trump’s primary campaign against DeSantis and defeated the Florida governor.

Joining Trump’s third campaign in its formative days, Wiles is one of the few top officials to survive an entire Trump campaign and was part of the team that put together a much larger operation professional for his third run at the White House — even though the former President usually broke through those barriers anyway.

She has largely avoided the spotlight, even refusing to take the microphone to speak as Trump celebrated his victory early Wednesday morning.

In his first administration, Trump went through four chiefs of staff — including one who served as acting for a year — during a period of record staff attrition.

Stephen Miller

Trump is naming longtime adviser Stephen Miller, an immigration opponent, to be deputy policy chief in his new administration.

Miller is one of Trump’s longest-serving advisers, dating back to his first campaign for the White House. He was a senior adviser in Trump’s first term and was a central figure in many of his policy decisions, particularly on immigration, including Trump’s move to separate thousands of immigrant families as a deterrent program in 2018 .

Miller also helped craft many of Trump’s tough speeches and was often the public face of those policies during Trump’s first term and during his campaigns.

Since leaving the White House, Miller has served as president of America First Legal, an organization of former Trump advisers modeled as a conservative version of the American Civil Liberties Union, challenging the Biden administration, media companies, universities and others on issues such as free speech and religion and national security.

He was also a frequent presence during Trump’s campaign this year, traveling on his plane and often speaking ahead of Trump during the pre-shows at his rallies.

Tom Homan

Former Immigration and Customs Enforcement director Tom Homan will be the “border czar” in the Trump administration, Trump announced to Truth Social.

Homan, a staunch Trump supporter, will be in charge of the mass deportations that Trump has promised throughout his 2024 campaign.

“I have known Tom for a long time and there is no one better at policing and policing our borders,” Trump wrote in his post Sunday night.

MORE | Former ICE Director Tom Homan to Join Trump Administration as ‘Border Czar’

“Likewise, Tom Homan will be in charge of all deportations of illegal aliens back to their country of origin. Congratulations to Tom. I have no doubt he will do a fantastic and long overdue job,” Trump added.

Homan oversaw ICE during the Trump administration’s “zero tolerance” enforcement of separating parents from their children at the border.

The American Civil Liberties Union (ACLU) estimates that there are between 500 and 1,000 families who have not been reunited.

Rep. Mike Waltz

Trump has asked Rep. Mike Waltz, R-Fla., to be his national security adviser, multiple sources said.

Rep. Lee Zeldin

President-elect Trump has tapped former Rep. Lee Zeldin to serve as EPA administrator, the second New Yorker elected to the cabinet.

Zeldin, who left Congress in 2023, was a surprising choice for the role. His public appearances, both in his own campaigns and on behalf of Trump, have often seen him speak on issues such as the military, national security, anti-Semitism, US-Israel relations, immigration, and crime.

He was among the Republicans in Congress who voted against certifying the results of the 2020 election. While in Congress, he did not serve on committees overseeing environmental policy.

In 2016, he pushed to change the designation of about 150 square miles of federal waters in Long Island Sound to state jurisdiction for New York and Rhode Island. He wanted to open up the striped bass fishery, which is allowed in state waters but prohibited in federal waters.

representative Elise Stefanik

President-elect Donald Trump has chosen Rep. Elise Stefanik to be his U.S. ambassador to the United Nations, multiple Trump officials confirmed to ABC News.

Republican Stefanik won re-election to a US House seat representing New York last Tuesday.

MORE | Trump picks Rep. Elise Stefanik of NY to serve as US ambassador to the United Nations

Stefanik has built a national profile as a staunch ally of President-elect Trump and a sharp-tongued partisan critic.

First elected to Congress in 2014 at the age of 30, she eventually shed her early reputation as a moderate Republican and rose to become the highest-ranking woman in the House Republican leadership.

Stefanik represents a largely rural district in upstate New York that includes some of the most sparsely populated parts of the state.

This is a developing story. Check back for updates.
ABC News and The Associated Press contributed to this report.