Rescue efforts began around 8:50 a.m. in the 10500 block of North Glenoaks Boulevard. The 49-year-old, identified as Javier Calderon Casas, died at the scene.
Two other workers — a 42-year-old and a 45-year-old man — were also hospitalized with minor injuries, according to the LAFD.
According to a GoFundMe account, Casas was married and had five daughters and three grandchildren.
It's unclear at this time what prompted the wall to collapse.
The Los Angeles Police Department and Cal-OSHA were notified, and the circumstances of the death were under investigation.