building entry design in las colinas tx

About O'Brien

We exist to create "O'MG Moments."

We exist to create
"O'MG Moments."

Architectural Firm

Founded in 1974 by Jack O’Brien, our firm is rooted in the belief that achieving dreams and treating each other like family are foundational principles. At O’Brien Architects, we are not just about creating exceptional designs but also about fostering memorable stories with our clients and each other. Our approach, blending art with landscape in timeless designs, has defined our legacy since the early days of “placemaking,” long before it became a buzzword.

Our work transcends the physical spaces we create; it’s about the human interactions and connections formed along the way. Every project is an opportunity to continue the legacy of collaboration, innovation, and family spirit that Jack O’Brien instilled, making O’Brien Architects a unique and inspiring place.

See Our Work
building entry design in las colinas tx

Bespoke Design: The O'Brien Difference

We stay curious and driven by the desire to create memorable moments through thoughtful design. We don't believe in standard solutions or imposing our "signature style." Unlike others, O'Brien delivers bespoke architecture to fit like a custom-tailored suit.

Years in Business

Team Members

Custom Experiences

Big Design without Big Egos.

O’Brien Architects embodies the character of its founding President, Jack O’Brien. His emphasis on integrity, respect, and service has shaped our corporate culture. Our team has established a loyal client base and developed professional relationships over decades by adhering to this value system.

We Believe...


We embody the spirit of relentless inquiry and constant evolution. Our team comprises self-motivated individuals seeking knowledge, challenging norms, and driving everyone toward excellence.


For us, thoughtfulness transcends mere work methodology. It's about weaving creativity into problem-solving and fostering empathetic connections within our team and client relationships.

We champion the ethos of collective brilliance over individual showmanship. Our team is a harmonious blend of diverse talents, where egos are set aside to build deep, meaningful collaborations with colleagues and clients.

So We...

Our approach is about deliberate pace and comprehensive vision. We move swiftly yet thoughtfully, always striving to uncover innovative solutions and perspectives others might overlook.


Our focus is on nurturing individuals of impeccable character, ready to expand their horizons. We invest in people passionate about growth, eager to learn, and committed to enriching our collective knowledge through collaboration.

the Wins

We believe in designing as a community, where every success is a shared triumph. Our culture is about elevating and celebrating together, acknowledging that every achievement results from our united efforts and intentional work.
Tailoring Your Space: Our Expertise, Your Vision

At O'Brien Architects, we don't just build brands; we lead, innovate, and collaborate to bring your vision to life. Our clients value the extensive experience we have gained from navigating various office and interior projects over 40 years. This experience has honed our ability to listen intently, understand unique project needs, and offer tailored advice, transforming us into trusted advisors for some of the industry's biggest names.

Our approach to design is collaborative, open, interactive, and imaginative. We see design as more than a process or an outcome; it's an experience that values the journey as much as the destination. It's about forming lasting relationships and creating impactful projects that endure. With us, your vision isn't just realized; it's enriched through a partnership that considers every aspect of your brand's identity and goals.

See Our Work

Our CEO: Guiding O'Brien Architects with Vision
Sean, CEO of O'Brien Architects, brings our firm a balanced blend of academic knowledge from Texas Tech University and practical expertise. His approach is centered on designing spaces that enhance human connections and experiences. Valuing collaborative relationships in every project, Sean leads with a focus on meaningful architectural solutions rather than imposing a signature style.

Building Communities:

Our Charitable Impact

O'Brien Architects is deeply committed to enriching our community through active partnerships with charitable organizations. Our firm proudly supports amfAR, the Leukemia & Lymphoma Society, the North Texas Food Bank, and the PGA Northern Texas Section Foundation, among others. These partnerships reflect our dedication to diverse causes, from advancing medical research to addressing community hunger and well-being.

Our engagement extends to supporting architectural and housing initiatives through collaborations with the Dallas Architecture Forum, the Interfaith Housing Coalition, and the LeTot Center. We at O'Brien Architects believe in using our skills and resources to foster positive change and build stronger, more resilient communities.

Brands we've served.
Billingsley Company
Lincoln Property Company
Nebraska Furniture Mart
Stonelake Capital Partners
The Howard Hughes Corporation
Blue Star Land

Client Testimonials

charlotte jones anderson - dallas cowboys

Charlotte Jones Anderson

Dallas Cowboys
"O'Brien is about incredible architecture. They are an amazing team who works tirelessly, who burn the midnight oil. You talk about people with passion, they are a passionate team. O'Brien has lead us on an epic path of greatness. We are excited to continue with our partnership with Sean and his team."
shawn fulham - lincoln property company

Shawn Fulham

Lincoln Property Company
"O'Brien has been a truly invaluable partner for Lincoln Property Company over the last 30 years. They have a comprehensive understanding of master planning, mixed use, and all the individual uses and components that make complex projects successful from both a design and financial standpoint. They have a long history of success, and always continue to stay on the cutting edge of design and development."
Lucy Billingsley, Billingsley Company

Lucy Billingsley

Billingsley Company
"Sean O’Brien and team have the creativity, alacrity and flexibility to be great design partners. They listen closely and then bring all the historical architectural smarts and a fresh eye to creating places where you’d like to be. They first think through making the public realm inviting and then enrich that with great architecture."

Kyle Nix

Pritchard Associates, Inc.
"I always enjoy working with the O’Brien team. They are very responsive and efficient, and work well with ownership to help keep projects on time and on budget."
John Griggs - Presidium

John Griggs

Presidium Group, LLC
"O’Brien, some of the most skilled in the country and truly design iconic structures. The team works hard and commits to every detail. You can expect them to drop everything, meet deadlines, work with the budget. They are just the best."
Presidium Group, LLC Logo

Josh Eames

Presidium Group, LLC
"O’Brien is one of our most trusted partners. O’Brien team, Your efforts are always top notch and you nail every project out of the park. You are key partner for us."
1 2 3