In the 1970s, she established ‘Max and Marilyn’ which specialized in Art Deco-inspired clothing and sold through iconic New York department stores Saks Fifth Avenue, Bergdorf Goodman and Bloomingdale’s. The collections were well received in the press, including Seventeen magazine, where she later became Fashion Director. Two years later she was commissioned by Simplicity to design a series of Twelve Room patterns. These were the original prototypes for the home-sewing market and the success of her patterns helped spark a new wave of interest in the industry. This success led directly to her appointment as Editor in Chief of Simplicity followed five years later by a move to Vogue Patterns.
In 1987 Fred Leighton, now well established as a luxury estate jeweller on Madison Avenue, approached Cooperman to work for him as a designer, creating modern jewels that would appeal to his clients tastes. She accepted the challenge despite having no formal jewellery training and immediately immersed herself in the fine jewellery world learning techniques such as wax carving which she mastered with the help of Arthur Angelino of New York’s Fashion Institute of Technology. She not only designed new jewels but also re-designing outdated pieces, breathing new life into often unloved antique and vintage pieces.
In 1994, after several successful years at Leightons, Cooperman decided to set up her own company to create her original designs. Her bold and brilliant jewels have been widely collected and have featured in several significant jewellery books and in exhibitions at museums such as the Museum of Fine Arts, Boston and the Museum of Art and Design in New York.