Nasthalia CASIMIR is the founder of NC Designs, a New York–based interior design studio specializing in refined residential interiors. Her work is defined by thoughtful planning, curated materials, and a timeless approach that balances elegance with livability.

Nasthalia holds a graduate degree in Interior Design from the New York School of Interior Design, where she developed a strong foundation in spatial planning, materials, and the principles of enduring design.

She began her career in the furniture industry as an interior design consultant with RH, working closely with clients to create cohesive interiors while gaining extensive knowledge of furnishings, materials, and craftsmanship.

Nasthalia later joined Council Creative as an Interior Designer, contributing to high-end residential projects. During this time, she specialized in custom furniture and millwork design and collaborated with collectible design galleries, including Carpenters Workshop Gallery and Galerie Philia, integrating art and collectible design into residential interiors.

Most recently, she served as a Senior Interior Designer at RS Mannino Architects, where she led the interior design direction for custom homes and full residential renovations. Her work spanned concept development through installation, including material selection, custom detailing, and the coordination of furnishings and finishes to create highly personalized homes.

inspired by travel, Nasthalia draws from the architecture, culture, and hospitality experiences she encounters around the world. These influences shape her perspective on interiors and inform the thoughtful, layered environments she creates for her clients.