Canaris will retire as chief of staff, Bloomberg News reported.
Canaris, a native of Puerto Rico who is fluent in Spanish, will become chief of the National Guard Bureau on Jan. 6, the news agency said.
The new chief of Staff, a civilian who has not yet been named, will replace Chief of Navy Charles F. Thomas, who was appointed by the White House in January to serve until the end of 2019.
Thomas was a career Navy officer who served from 2002 to 2006 as the Navy’s director of intelligence, surveillance and reconnaissance.
He was promoted to his current position in February after serving for more than three decades in the Navy.
The Navy said that Canaris is in good health and in good spirits.
Canalis served in the U.S. Army from 2003 to 2008 and then returned to the Navy as a civilian.
He then served as chief deputy commander of the Naval Support Activity and was later named to the Senate Armed Services Committee in 2013.
His first book, “Sailing on the Seas: An American Hero’s Story,” was published in 2016 and became a best-seller.
Canari was elected to the state legislature in 2012.
In his role as governor, Canaris served on the state’s Advisory Council on the National Oceanic and Atmospheric Administration, a job that includes the oversight of federal fisheries programs.