He designed the logos of Motorola and the Peace Corps while employed at the Chicago studio of Morton Goldsholl Associates and was the creative director of the 1975 rebrand of 7-Up.

He graduated from there in 1941 after having earned a bachelor's degree in education with a focus on art, and subsequently enlisted in the U.S. Army, where he attained the rank of first sergeant, serving in the 3437 Quartermaster Truck Company[3][4] during World War II.

[8] Because it was a small office with a reputation for innovation and quality, it was a rare occasion when a chance to work for Goldsholl presented itself, and when this happened in 1950, Miller pursued the opportunity with his usual diligence.

His first efforts were made in New York City and New Jersey, and although he received an offer of employment with the understanding that he could work behind a screen so that his presence would not be obvious to the other designers and corporate clients, he considered this circumstance to be unacceptable.

After exhausting whatever possibilities might have existed in the Northeastern United States, the next stop on his itinerary was Chicago, where he landed a job first with Gerstel-Loeff, and eventually with Morton Goldsholl.

[20] The innovation of Morton Goldsholl Associates wasn't expressed only in art per se - for example in 1953 the firm designed "a new line of modern [children's] furniture that was designed to 'grow'" with the child,[21] and was awarded a patent in 1985 for the invention of an "Image processor and method for use in making photographic prints", which was capable of making unusual images using ordinary photographic film.

[24] He was the first African American to break into the mainstream profession of graphic artist, and during the 1950s and 60's was one of few to maintain a membership in traditional trade organizations like The Society of Typographical Arts.

This frequently led to a spontaneous commission, where Miller would part with his current project for pocket change (or equally as often by making a gift of it) when a passer-by stopped to admire his work.

[6] In addition to portraits of the founders, the series includes a portrait of Jean Baptiste Point du Sable, the late Chicago mayor Harold Washington, and a collage depicting the history of Chicago.It was at a show at Hyde Park in Chicago that Miller was approached by Margaret Taylor-Burroughs, then director of the DuSable Museum, to create some kind of memorial to the museum's founders.

For these commissions, the "copies" were always made different in some respect, either by a change in the size or color, or by the addition of some feature which only a side-by-side comparison of the original would reveal.

The collection includes photographs, proofsheets, slides, award certificates, realia, prototypes, calendars, periodicals and samples of his branding designs ranging from 1953-1996.

[27] Over the course of a career (both independent and professional) that spanned nearly three quarters of a century, Miller produced over 1000 works of art that include internationally recognized corporate branding, illustrations for books, lithographs, drawings, sculptures, and various other projects.