Hill remained assigned to Mrs. Kennedy and the children until after the 1964 presidential election.
He then was assigned to President Lyndon B. Johnson at the White House.
In 1967, when Johnson was still in office, Hill became the Special Agent in Charge (SAIC) of presidential protection.
When Richard Nixon came into office, Hill moved over to SAIC of protection of Vice President Spiro Agnew.
Finally, Hill was assigned to headquarters as the assistant director of the Secret Service for all protection.
He retired in 1975.

In a 1975 interview with Mike Wallace, Hill tearfully surmised that if he had reached the vehicle a second earlier, he would have been able to take the third shot to his own body, and felt a great deal of regret for not having been able to reach there in time.

Hill wrote the foreword to Gerald Blaine and Lisa McCubbin's 2010 narrative, The Kennedy Detail.

In a BBC Today interview, broadcast in December 2010, Hill recalled the assassination and his first visit to Dallas in 1990 since the events of 1963, during which he surveyed the scene of the shooting.
Asked whether he thought that the President's life might have been saved if things had been done differently, Hill replied that "He [Lee Harvey Oswald] had all the advantages that day.
We had none.
And it was a very easy job to accomplish because of the way everything was laid out."

Hill was interviewed by Brian Lamb on C-SPAN's talk show Q&A in May 2012.

In April 2012, the book Mrs. Kennedy and Me was published, in which Hill looked back at his career and described his working relationship with Jacqueline Kennedy.
The same year, Hill was inducted into the Scandinavian-American Hall of Fame, a signature event of the North Dakota-based organization Norsk Høstfest.

In 2012, Hill was reported to have lived in Alexandria, Virginia, for "many years."

In November 2013, to coincide with the 50th anniversary of the assassination, Hill's book Five Days in November was published, giving his view of the events.

In 2016, Hill released Five Presidents: My Extraordinary Journey with Eisenhower, Kennedy, Johnson, Nixon, and Ford, which summarized his entire Secret Service career.

On October 5, 2018, Hill received the Theodore Roosevelt Rough Rider Award from Doug Burgum, the Governor of North Dakota.
The award is North Dakota's award for residents and former residents of North Dakota.
Hill remained assigned to Mrs. Kennedy and the children until after the 1964 presidential election. He then was assigned to President Lyndon B. Johnson at the White House. In 1967, when Johnson was still in office, Hill became the Special Agent in Charge (SAIC) of presidential protection. When Richard Nixon came into office, Hill moved over to SAIC of protection of Vice President Spiro Agnew. Finally, Hill was assigned to headquarters as the assistant director of the Secret Service for all protection. He retired in 1975.
In a 1975 interview with Mike Wallace, Hill tearfully surmised that if he had reached the vehicle a second earlier, he would have been able to take the third shot to his own body, and felt a great deal of regret for not having been able to reach there in time.
Hill wrote the foreword to Gerald Blaine and Lisa McCubbin's 2010 narrative, The Kennedy Detail.
In a BBC Today interview, broadcast in December 2010, Hill recalled the assassination and his first visit to Dallas in 1990 since the events of 1963, during which he surveyed the scene of the shooting. Asked whether he thought that the President's life might have been saved if things had been done differently, Hill replied that "He [Lee Harvey Oswald] had all the advantages that day. We had none. And it was a very easy job to accomplish because of the way everything was laid out."
Hill was interviewed by Brian Lamb on C-SPAN's talk show Q&A in May 2012.
In April 2012, the book Mrs. Kennedy and Me was published, in which Hill looked back at his career and described his working relationship with Jacqueline Kennedy. The same year, Hill was inducted into the Scandinavian-American Hall of Fame, a signature event of the North Dakota-based organization Norsk Høstfest.
In 2012, Hill was reported to have lived in Alexandria, Virginia, for "many years."
In November 2013, to coincide with the 50th anniversary of the assassination, Hill's book Five Days in November was published, giving his view of the events.
In 2016, Hill released Five Presidents: My Extraordinary Journey with Eisenhower, Kennedy, Johnson, Nixon, and Ford, which summarized his entire Secret Service career.
On October 5, 2018, Hill received the Theodore Roosevelt Rough Rider Award from Doug Burgum, the Governor of North Dakota. The award is North Dakota's award for residents and former residents of North Dakota.
Clint Hill (Secret Service)