103 Terrace Street, Roxbury, MA 02120

Massachusetts Biologics Laboratory

BOSTON, MASSACHUSETTS

Dewitt Center

BOSTON, MASSACHUSETTS

The Clarion Mixed-Use Development

ROXBURY, MASSACHUSETTS

Renaissance Parking Garage

BOSTON, MASSACHUSETTS

Boston Police Headquarters

BOSTON, MASSACHUSETTS

Leadership

The firm was established by the late Donald L. Stull, an African American pioneer in the profession. He was a graduate of the Harvard Graduate School of Design, a member of the distinguished College of Fellows of the American Institute of Architects, and recipient of the Boston Society of Architects 1997 Award of Honor.

Elliot Guerrero, AIA
Project Architect

Elliot is an accomplished architect with expertise spanning building design, project management, and technical delivery. Known for his credibility and reliability, he brings strong collaborative skills to fast-track project models, guiding clients and colleagues through complex processes with clarity and precision. His work demonstrates a seamless transition from concept to completion—developing interior and exterior design ideas, coordinating consultants, navigating regulatory requirements, and resolving challenges in the field.

At the urban scale, Elliot offers specialized insight into planning and policy, with experience in zoning legislation, land use, housing production, mixed-use development, and community planning. His perspective is further shaped by public service, having been appointed as an architect member of the City of Boston Zoning Commission. Across all settings, Elliot bridges design vision with pragmatic execution to deliver thoughtful, impactful solutions.

M. David Lee, FAIA, NOMA
President

David Lee is a nationally recognized architect, urban designer, and planner with over four decades of experience leading impactful, community-centered design. His portfolio includes civic, institutional, and residential projects such as The Clarion in Boston, Oakwood Shores in Chicago, and the award-winning Dutch Point master plan in Hartford.

A Fellow of the American Institute of Architects and recipient of NOMA’s Lifetime Achievement Award, David has shaped major public initiatives from post-Katrina recovery in New Orleans to Boston’s air rights vision over the Massachusetts Turnpike.

He has taught at Harvard, MIT, and RISD, and served as president of the Boston Society of Architects. David remains committed to advancing equitable, design-driven solutions across architecture and urban planning.

Thomas J. Maistros, Jr., RA
Senior Project Manager/Urban Designer/ Architect

Tom Maistros brings over four decades of architectural and urban design experience, with deep expertise in public approvals, environmental review, and complex project delivery. He has led a wide range of development efforts, from civic and institutional projects to large-scale housing and commercial plans across Boston and beyond.

As both a former executive at the Boston Redevelopment Authority and director of the Boston Civic Design Commission, Tom has shaped many of the city’s most visible projects and guided them through design and permitting with clarity and efficiency.

His role at S+L bridges planning and execution—managing schedules, overseeing compliance, and advising clients on city and state regulatory processes. Tom also brings valuable healthcare planning experience from his time at Partners HealthCare, including leadership on major capital projects for Spaulding Rehabilitation Hospital.

Across all sectors, he is known for balancing design vision with pragmatic, results-driven coordination.

 

Vision, Content, and Detail Grounded in Theory and Creative Invention.

At Stull and Lee we approach each project with the understanding that architecture and urban design require not only creativity, but also practicality, responsibility and organization. We avoid the direct application of stored solutions, whether found via research or in our past work. While the importance of experience must not be denied, its proper role is to inform the creative process of design and not simply to offer a palette of past options from which to choose Equally important to our design approach, is the inclusion of the client throughout the design process. In each project, we strive for design solutions that are uniquely responsive to time and place.