Milder is renowned in São Paulo, one of the major international centers for street and public art, as a seminal influence on graffiti artists.
[8] During his time as a student in Chicago, Milder exhibited with the Momentum Group, an alliance of emerging artists who were particularly dedicated to the progression of figurative art and its global origins.
Back in the United States, Milder and his family moved to New Dorp Beach in Staten Island, in order to raise his daughters without fear of eviction.
[citation needed] He created a studio in the abandoned concrete seaside hospital of the St. John's Guild where he could produce long paintings in its wings and host parties for friends from the city.
He exhibited his work at the Sun Gallery, with his contemporaries, including Mary Frank, Red Grooms, Bob Thompson, Lester Johnson, Emilio Cruz and Alex Katz, among others.
In Summer of 2009 he was in Brazil where at this time he painted a commissioned mural alongside Brazilian street artist, Eduardo Kobra in São Paulo.
From Milder's perspective, the Kabbalah underlies all aspects of reality including not only the way a painting is conceived and executed, but also its impact on the visual environment around us.
When 40 of these paintings were shown in a traveling exhibition premiering at the Richard Green Gallery in New York City, in 1987, art critic Donald Kuspit wrote in Artforum Magazine: “after Nolde's biblical pictures, these are the best and most integral group of biblical pictures in the 20th century.”[14] From the 1970s through the 2000s, much of Milder's artworks have been centered around interpretations of the Kabbalah, including Jewish numerology.