Liesl Geiger and Andrea Mason were classmates at the Yale School of Architecture and joined forces years later to form Geiger Mason Design. Their shared sensibility is one that embraces materials, details, and proportion in relationship to the specificity of a project. For them this transcends style. Currently they are working on numerous residential and commercial projects which vary in size and include apartments, townhouses, a large post production film editing facility in a SoHo loft space, and freestanding houses in Bridgehampton, New York, and Castine, Maine.

Before forming Geiger Mason Design, Liesl Geiger worked with a varied array of leading architects and designers. With Robert A.M. Stern Architects, she designed homes and institutional spaces in a variety of languages, including modern, shingle and Sonoma vernacular. Earlier in her career, she worked with Peter L. Gluck & Partners and Peter Marino helping develop modern urban townhouses, corporate offices and commercial spaces. With Vermont architect Turner Brooks, she designed rustic modern furniture. Geiger also has a special interest in glass, and was an apprentice to the New York architectural glass designer James Carpenter. During a year long Fulbright Fellowship in Helsinki, Finland, she studied glass and light in architecture at the University of Industrial Arts. In her own design studio, before joining forces with Andrea Mason, Liesl renovated traditional and modern New York apartments, built a Vermont mountain home and a New York townhouse. She is also the author of The Essence of Home: Timeless Elements of Design, published by The Monacelli Press in November, 2007. A graduate of the Yale School of Architecture in 1994, Liesl is the recipient of the Anne C.K. Garland Award. In 1990, she graduated from Yale College Summa cum Laude with distinction in the major of History of Art.

Andrea Mason also worked with a rich array of well known architects and designers before forming Geiger Mason Design. With Stephan Jaklitsch Design, she designed retail stores in Tokyo, Taipei, Hong Kong, and Los Angeles and branding concepts for the New York based designer Marc Jacobs. Earlier in her career, she worked with Polshek Partnership on the Brooklyn Museum of Art and Steven Harris Architects, helping develop eclectic urban townhouses and residences. With the Arizona desert architect Will Bruder, she helped design an addition to the Scottsdale Museum of Art. Mason has also been involved in exhibition design, creating installations for the video artist John Pilson in the 2000 Venice Bienale as well as a video viewing environment for the PS 1 New York Animations 2001 exhibition in New York and Berlin. A graduate of the Yale School of Architecture in 1994, she is the recipient of the Moulton Andrus Award and Drawing Prize. In 1990, she graduated with honors from Barnard College where she undertook a dual major in Architecture and German Literature.