WASHINGTON — President Trump picked Army Lt. Gen. H.R. McMaster as his new National Security Adviser, one week after booting retired Lt. Gen. Michael Flynn from the post.

“He’s a man of tremendous talent and tremendous experience,” Trump said of McMaster. “…He is highly respected by everybody in the military. And we’re very honored to have him.”

Trump made the President’s Day announcement from his Mar-a-Lago Florida resort seated on couch between McMaster and acting National Security Adviser Keith Kellogg.

Kellogg, a retired Lt. General in the Army, will stay on as chief of staff to the National Security Council.

“I think that combination is something very, very special,” Trump said of the two men who have known each other for years.

McMaster, 54, is a decorated career officer in the Army who holds a Ph.D in military history. He authored a critical book about the Vietnam War called “Dereliction of Duty: Lyndon Johnson, Robert McNamara, the Joint Chiefs of Staff, and the Lies That Led to Vietnam.”

McMaster called his new position a “privilege.”

“I look forward to joining the national security team and doing everything I can to advance and protect the interests of the American people,” McMaster said.

Kellogg, 72, praised McMaster as a “great statesman” and a “great soldier.”

Trump asked for Flynn’s resignation a week ago, after he misinformed Vice President Mike Pence about his conversations with the Russian ambassador about US sanctions.

Asked if Pence played a role in making McMaster National Security Advisor, Trump told reporters: “He did.”

Trump previously offered the job to retired Navy Vice Adm. Robert Harward, but he declined.

Over the weekend at Mar-a-lago Trump met with other four candidates: McMaster, Kellogg, former United Nations ambassador John Bolton and West Point superintendent Lt. Col. Robert Caslen.

Trump said he was impressed with the candidates and he intends to offer a different role to Bolton, who was a staunch backer of the Iraq War.

“We’ll be asking him to work with us in a somewhat different capacity,” Trump said.

McMaster is a decorated career Army officer who served in the Persian Gulf, Iraq and Afghanistan. He was captain of a great tank battle victory in the Gulf War known as the battle of 73 Easting.

Since 2014, McMaster has served as Director of the Army Capabilities Integration Center and Deputy Commanding General, Futures, at the US Army Training and Doctrine Command.

In April, McMaster warned senators the US Army is too small and lacks modernization to keep up with the current threat level.

“We are outranged and outgunned by many potential adversaries,” McMaster said at a Senate subcommittee hearing, according to Breakingdefense.com. “[and] our army in the future risks being too small to secure the nation.”