Following military service in World War I, Maltzman returned to Boston, where he began studying architecture.

He established an office at 169 North La Brea Avenue, and later at 704 South Spring Street.

Maltzman passed this fandom on to his children as well, and as Elliott, Muriel and Donald grew up and had families of their own, they would all gather each Sunday to watch the Patriots play football.

[2] Several of Maltzman's buildings have become significant monuments, for example, The Ravenswood in Hollywood, which the City of Los Angeles declared in 2003 to be a Historic Cultural Monument, and the Charmont Apartments, which the federal government has placed on the National Register of Historic Places.

In 1952, Maltzman was hired by Chicago organized crime figures to be the supervising architect for the Sahara Casino in Las Vegas.