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Meet O'Sullivan Architects

The value of an architectural firm is in the talents of the people who work there. At O’Sullivan Architects, our team of associates offers the foremost insight in design and technical competency, built on practical experience, and reinforced by a history that instills confidence.

David O'Sullivan

David O'Sullivan, AIA

Founder and President

David is licensed in Massachusetts, New Hampshire, Florida, Rhode Island, New York, and New Jersey. He is a member of American Institute of Architects (AIA) and has over 40 years of experience in both residential and commercial design. He is currently the president-elect of Home Builders and Remodelers of Massachusetts and active with the National Association of Home Builders.

Donnie Garrity, LEED AP

Associate Principal

With O'Sullivan Architects since 2013, Donnie has been a principal since 2023. Donnie brings an innovative and considerate approach on all  projects.

Donnie Garrity
Erion Nikolla

Erion Nikolla, AIA

Associate Principal

Erion first worked at O'Sullivan Architects while working on his Architecture degree. He then started his own firm after becoming a member of AIA and has now returned to O'Sullivan Architects as a principal.

Jonathan Stone

Associate Principal

After joining O’Sullivan Architects in August of 2002, Jonathan has been involved in the approval, design, and construction of a wide variety of projects. Incorporating a range of architectural styles with respect to the client’s requirements and wishes, Jonathan uses his unique and thoughtful design approach to create meaningful, useful spaces for today’s lifestyle.

Jonathan Stone

O'Sullivan Architects Team

Meghan Bearfield   -   David O'Sullivan   -   Erion Nikolla   -   Stefanie Good   -   Donnie Garrity   -   Kristen O'Brien   -   Joey Shields   -   Jonathan Stone   -   Mark Sereda   -    Sara Colozzi

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