[2] Rubin was represented by the Bertha Schaefer Gallery,[2] where he participated in several group exhibitions that focused on hybrid forms, featuring young artists working between painting and sculpture.

[10] His work was also included in "New Directions" at Pace Gallery, a group show with construction and assemblage contributions by Jim Dine, Bernard Langlais, and Louise Nevelson.

[14] Rubin taught in the Architecture department at UT Austin in the mid 1950s, where he instructed Color and Freehand Drawing courses alongside John Hejduk, Robert Slutzky and others, as part of a group of faculty known as the Texas Rangers.

[4] In the 1960s and 70s, Rubin taught Freehand Drawing to Architecture students at Cooper Union, under the leadership of John Hejduk.

[14] Artwork created in Rubin's Freehand Drawing course have been exhibited at the Museum of Modern Art in New York, and reproduced in Education of an Architect: A Point of View, the MoMA exhibition catalog,[14] in Cynthia Dantzic's Design Dimensions: An Introduction to the Visual Surface (Prentice Hall, 1990)[15] and in Alexander Caragonne's The Texas Rangers: Notes from an Architectural Underground, (MIT Press, 1995).