He enlisted in the Cuban Constitutional Army in 1949 after graduation from high school, when financial problems forced him to give up studying architecture at the University of Havana.

He formed part of the commission that was created to cleanse the Armed Forces, but was arrested and accused in Case 39/59 in April 1959.

Montero Duque was wanted by the revolutionary courts, accused of having committed abuses against the civilian population during his service in Oriente.

After the brigade had ceased fighting on 19 April 1961, the third day of the Bay of Pigs Invasion, San Román and his men scattered into the woods and swamps.

On 29 December 1962, Pepe San Román was on stage next to the 35th US president, John F. Kennedy, at the Orange Bowl in Miami during the homecoming ceremony for captured Brigade 2506 veterans.

Pepe Perez San Román committed suicide by taking an overdose in Miami, Florida, on 10 September 1989.

[4] He was survived by two sons, Alfredo and Robert; two daughters, Marisela and Sandra; a brother, Roberto Pérez San Roman, a sister, Laly de la Cruz, and five grandchildren.