With Hampton Advertising Agency, New York City, 1901-1910. Copy writer, then copy chief Charles H. Fuller Company, Chicago, 1910-1911. General manager, treasurer Martin V. Kelley Company, Toledo, 1911-1918.
Western manager Frank Seaman, Inc., advertising, Chicago, 1918. Vice president, senior account supervisor H.E: Leason Advertising Agency, New York City, 1919-1920. Co-founder Zimmer, Keller Advertising Agency, Detroit, 1920, vice president, 1920-1950, president, 1950-1960.
Chairman of the Board successor agency Zimmer, Keller & Calvert, Inc., since 1960.