Founder & Creative Director

Kay Marshall-Seidman, owner of Marshall Design, has spent more than 35 years at the intersection of fashion, manufacturing, and innovation, with a footprint across Los Angeles, the San Francisco Bay Area, and international markets. She’s a savvy businesswoman, a style maven, and an artist with a deep love of design, travel, music, theater, photography, technology, architecture, art, and food. She was building streetwear and athleisure before either word had a hashtag.

Kay brings an eagle eye for detail and a talent for solving problems fast. She’s a lifelong creator, a mentor to the next generation of designers, and a connector who links people across industries. Her energy and curiosity keep pushing the work forward: new materials, smarter and more sustainable processes, new markets, and the evolving world of wearable tech. Whether she’s launching a collection or championing an emerging talent, she leaves things better than she found them.