A former U.S. ambassador to Bolivia and a National Security Council member was charged after working against the U.S. government for decades for communist Cuba in “clandestine intelligence-gathering missions.”

“This action exposes one of the highest-reaching and longest-lasting infiltrations of the United States government by a foreign agent,” Attorney General Merrick B. Garland said.

“We allege that for over 40 years, Victor Manuel Rocha served as an agent of the Cuban government and sought out and obtained positions within the United States government that would provide him with access to non-public information and the ability to affect U.S. foreign policy,” Garland said. “Those who have the privilege of serving in the government of the United States are given an enormous amount of trust by the public we serve. To betray that trust by falsely pledging loyalty to the United States while serving a foreign power is a crime that will be met with the full force of the Justice Department.”

Victor Manuel Rocha’s career in covert work began in 1980, before his stunning fall from grace in 2012.

The DOJ said that Rocha provided false and misleading information to the U.S. to maintain his secret status, traveled outside the U.S. to meet with Cuban intelligence operatives, and made false and misleading statements to obtain travel documents.

According to the complaint, Rocha made a series of recorded admissions to an undercover FBI agent who posed as a Cuban intelligence operative who reached out to Rocha on WhatsApp, saying that he had a message, “from your friends in Havana.”

Rocha praised the late communist leader Fidel Castro, calling him “comandante,” branded the U.S. the “enemy” and bragged about his service for more than 40 years as a Cuban mole in the heart of U.S. foreign policy circles.

Rocha also described his work as a Cuban agent as “a grand slam.”

Rocha was charged with conspiring to act as an agent of a foreign government without prior notification to the Attorney General; acting as an agent of a foreign government without prior notification to the Attorney General; and with using a passport obtained by false statement.

This image provided by the Justice Department and contained in the affidavit in support of a criminal complaint, shows Victor Manuel Rocha during a meeting with an FBI undercover employee. (Department of Justice via AP)

During a hearing in federal court in Miami on Thursday, Rocha said he had agreed to plead guilty to two charges of conspiring to act as an agent of a foreign government, according to The Associated Press.

Prosecutors agreed to dismiss more than a dozen other charges in exchange for his guilty plea, the AP said.