In 1978, de Verteuil enrolled at the Fashion Institute of Technology, where she studied fashion design and merchandising. As her professional career gained momentum, her formal studies began to recede. By 1981, she was just two credits shy of completing her degree but chose instead to launch her business. That decision set the course for her career. She began showing her work at accessories trade shows in the United States and abroad. She soon opened the short-lived Vashti—using her middle name professionally—on the edge of the then not-yet-gentrified East Village. It closed and she opened Gallery Vercon at 332 East Ninth Street two years later.
Her work soon attracted the attention of major figures in the fashion world. She showed her designs to Oscar de la Renta, whom she recalls as gracious and well-mannered. It was Loris Azzaro and Jean-Louis Scherrer, however, with whom she ultimately collaborated. Yves Saint Laurent also expressed sustained interest in her work, particularly her couture belts, leading to a two-year collaboration in the early 1980s, a decade marked by oversized silhouettes often defined by bold, decorative belts. Her career unfolded at a pace that mirrored the intensity and speed of the fashion industry itself.