[4] Foster attended night school at Cooper Union and studied architecture.
[4] Foster is said to have worked in the office of Henry Hardenbergh from 1888 to 1889, who designed the New York City landmarks Dakota Apartment Building, Plaza Hotel, and the first Waldorf-Astoria, on the present site of the Empire State Building.
[4] Tandy & Foster designed St. Philip's Episcopal Church (Harlem, New York) in 1910.
[4] He relocated with his wife, Carrie, to Park Ridge, New Jersey in a house he designed and built.
[4] He died on December 20, 1923, in a house he designed on Colony Avenue, in Bergen County, Park Ridge, New Jersey.