Ellen Mandelbaum works in watercolors, stained glass, oil paints, and gilding. She has exhibited internationally and her art has been featured in several one-person exhibitions at the Queens College Art Center in Flushing, NY and in a one-person show at Gallery35 in Manhattan.

She is internationally recognized for her innovative stained glass commissions. These include installations for The Queens College Art Center, Marian Woods Retirement Facility in Westchester, and a thirty-foot high window for the South Carolina Aquarium.