Tillotson Design Associates, founded in 2004, is a WBE lighting design consultancy based in New York City. A diverse staff with backgrounds in architecture, interior design, and theater, including several LEED accredited professionals, combine talents to create exemplary work. Together, our principals provide over 80 years of lighting expertise. The launch of Tillotson Design Associates came just after Ms. Tillotson completed lighting designs for the Seattle Central Public Library and Prada Beverly Hills with the Office for Metropolitan Architecture.

Collaborating with developers, architects, and interior designers throughout the world, our diverse portfolio includes interior and exterior lighting for corporate headquarters, universities, hotels, libraries, master plans, museums, parks, performance halls, residences, restaurants, and retail establishments. 


Our passion for design excellence, meticulous attention to detail, and heavy principal involvement from concept to final focusing contributes to our success. We have no preconceived notions about what works. We welcome new challenges and enjoy the exploration and research of unique materials and ideas. We offer solutions, but encourage collective decision making by the entire design team and client. Our goal is to provide the best possible lighting design service for our clients.


Our architecturally diverse and prestigious clients include: Adjaye Associates; Alexander Gorlin Architects; Allan Greenberg Architect; Architecture Research Office; Asymptote Architecture; BIG-Bjarke Ingels Group; Cooper Robertson; CDR Studio Architects; Cetra Ruddy; Diller Scofidio + Renfro; Ennead Architects; Foster + Partners; FX Collaborative; Gabellini Sheppard Associates; Gensler; Inaba Williams; Isay Weinfeld; James Carpenter Design Associates; James Corner Field Operations; Ken Smith Workshop: Landscape Architecture; KMW Architecture; Kazuyo Sejima + Ryue Nishizawa-SANAA Ltd; Kliment Halsband Architects; Kohn Pedersen Fox; KPMB Architects; Leven Betts Studio;  Maya Lin Studio; Michael Van Valkenburgh Associates; Morphosis; OMA-Office for Metropolitan Architecture; Rafael Vinoly Architects; Renzo Piano Building Workshop; REX; Rogers Partners Architects + Urban Designers; Scape/Landscape Architecture; SnoHetta; Studio V Architecture; SHoP Architects; SOM-Skidmore, Ownings, & Merrill;  Weiss/Manfredi Architecture; West 8 Urban Design & Landscape Architecture; and WORKac.

Professional Services

Tillotson Design Associates, with twenty-one professional and three administrative staff members, has technical expertise in the following specialty areas:

  • custom luminaire design

  • daylighting

  • restoration and renovation

  • art and exhibition 

  • sustainability program certification 

  • computer calculations and simulations

  • renderings and illustrations 

  • 3D modeling 

We offer a full scope of services from schematic design through the construction phase. In addition to luminaire specifications, shop drawing review, and lighting drawings, our services include production of meticulous working details for custom fixtures and mock-ups, as well as daylighting and computer rendering capabilities. Our team approach allows us to produce cost effective designs in an efficient manner. The accessibility of all team members during all phases of the project assures timely responses.