Sarmiento studied in various locations in South America, for eighteen months in the office of Oscar Niemeyer, before coming to the United States. In 1951 while visiting his sister-in-law in Missouri he rear ended an architect who worked for the St. Louis based Bank Building & Equipment Corporation of America. He was hired soon after and served as the head designer for the corporation from 1951 through 1961, after which he founded his own sixty-person Sarmiento Associates office based in St. Louis, Missouri. He relocated to Santa Monica California in the 1970s. He retired in 1980.
Sarmiento designed hundreds of banks and other buildings in the postwar years of bank modernization in downtowns, and the construction of new suburban bank towers. His larger work appears as crisp International Style with a visible influence from Niemeyer, perhaps most obvious in his largest project, the 1968 Phoenix Financial Center on Central Avenue in Phoenix, Arizona. The smaller branch banks tend to be more playful, eye-catching, Googie projects.
Sarmiento lived in Santa Monica, California and was still active in the preservation of his buildings until his death in 2013.
American Investment Co. of Illinois, 8251 Maryland Avenue, Clayton Missouri (1955)[7]
Hibernia National Bank, New Orleans, Louisiana (1955)
Jefferson Bank and Trust Building, 2600 Washington Avenue, St. Louis Missouri (1956)[8]
Fidelity Federal Savings & Loan Building, 225 E. Broadway, Glendale California (1956) - Now Hollywood Production Center.
Bank Building & Equipment Corporation of America Headquarters, 1130 Hampton Avenue, St. Louis, Missouri (1957) - Now Salvation Army Midland Division.[9]
Great Western Savings Bank, 8201 Van Nuys Boulevard, Panorama City, California, (1957) - Now LA Furniture Center.
Crenshaw Savings & Loan, 4401 Crenshaw Boulevard, Los Angeles, California (1958) - now Chase Bank)
Firestone Bank, 1115 S. Main Street, Akron, Ohio (1958) - Now Verge Building.[10][11]
Glendale Federal Savings and Loan, 401 N. Brand Boulevard, Glendale, California (1959) - Now Hollywood Production Center.[12]
Liberty National Bank & Trust Building, 416 W. Jefferson Street, Louisville, Kentucky (1960) - Now Chase Bank.
Security Federal Savings & Loan, (Skyline Building) 2600 Dr. M.L.K. Jr. N. Street, St. Petersburg, Florida (1961)[13][14]
Salinas Valley Savings & Loan, 425 Main Street, Salinas, California (1962) - Now Chase Bank.
Salinas Valley Savings & Loan, 1725 Saratoga Avenue, San Jose, California (1962) - Now Chase Bank.
Newport Balboa Savings Headquarters Building, 3366 Via Lido, Newport Beach, California (1963) - Significantly altered.[5]